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data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-Overview" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Overview"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Overview</span> </div> </a> <ul id="toc-Overview-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-History" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#History"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>History</span> </div> </a> <ul id="toc-History-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Soft_404_errors" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Soft_404_errors"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Soft 404 errors</span> </div> </a> <button aria-controls="toc-Soft_404_errors-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Soft 404 errors subsection</span> </button> <ul id="toc-Soft_404_errors-sublist" class="vector-toc-list"> <li id="toc-Proxy_servers" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Proxy_servers"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Proxy servers</span> </div> </a> <ul id="toc-Proxy_servers-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Intentional_404s" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Intentional_404s"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Intentional 404s</span> </div> </a> <ul id="toc-Intentional_404s-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Microsoft_Internet_Server_404_substatus_error_codes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Microsoft_Internet_Server_404_substatus_error_codes"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Microsoft Internet Server 404 substatus error codes</span> </div> </a> <button aria-controls="toc-Microsoft_Internet_Server_404_substatus_error_codes-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Microsoft Internet Server 404 substatus error codes subsection</span> </button> <ul id="toc-Microsoft_Internet_Server_404_substatus_error_codes-sublist" class="vector-toc-list"> <li id="toc-Substatus_codes" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Substatus_codes"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Substatus codes</span> </div> </a> <ul id="toc-Substatus_codes-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Custom_error_pages" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Custom_error_pages"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Custom error pages</span> </div> </a> <ul id="toc-Custom_error_pages-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Tracking_404_errors" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Tracking_404_errors"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Tracking 404 errors</span> </div> </a> <ul id="toc-Tracking_404_errors-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">HTTP 404</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 53 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-53" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">53 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B1%D8%B3%D8%A7%D9%84%D8%A9_%D8%A8%D8%B1%D9%88%D8%AA%D9%88%D9%83%D9%88%D9%84_%D9%86%D9%82%D9%84_%D8%A7%D9%84%D9%86%D8%B5_%D8%A7%D9%84%D9%81%D8%A7%D8%A6%D9%82_404" title="رسالة بروتوكول نقل النص الفائق 404 – Arabic" lang="ar" hreflang="ar" data-title="رسالة بروتوكول نقل النص الفائق 404" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-awa mw-list-item"><a href="https://awa.wikipedia.org/wiki/404_%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A5%81%E0%A4%9F%E0%A4%BF" title="404 त्रुटि – Awadhi" lang="awa" hreflang="awa" data-title="404 त्रुटि" data-language-autonym="अवधी" data-language-local-name="Awadhi" class="interlanguage-link-target"><span>अवधी</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%8F%E0%A6%87%E0%A6%9A%E0%A6%9F%E0%A6%BF%E0%A6%9F%E0%A6%BF%E0%A6%AA%E0%A6%BF_%E0%A7%AA%E0%A7%A6%E0%A7%AA" title="এইচটিটিপি ৪০৪ – Bangla" lang="bn" hreflang="bn" data-title="এইচটিটিপি ৪০৪" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%8F%E0%A4%9A%E0%A4%9F%E0%A5%80%E0%A4%9F%E0%A5%80%E0%A4%AA%E0%A5%80_404" title="एचटीटीपी 404 – Bhojpuri" lang="bh" hreflang="bh" data-title="एचटीटीपी 404" data-language-autonym="भोजपुरी" data-language-local-name="Bhojpuri" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Bulgarian" lang="bg" hreflang="bg" data-title="HTTP 404" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Error_404" title="Error 404 – Catalan" lang="ca" hreflang="ca" data-title="Error 404" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Czech" lang="cs" hreflang="cs" data-title="HTTP 404" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Danish" lang="da" hreflang="da" data-title="HTTP 404" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – German" lang="de" hreflang="de" data-title="HTTP 404" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Greek" lang="el" hreflang="el" data-title="HTTP 404" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Spanish" lang="es" hreflang="es" data-title="HTTP 404" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Esperanto" lang="eo" hreflang="eo" data-title="HTTP 404" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Basque" lang="eu" hreflang="eu" data-title="HTTP 404" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AE%D8%B7%D8%A7%DB%8C_%DB%B4%DB%B0%DB%B4" title="خطای ۴۰۴ – Persian" lang="fa" hreflang="fa" data-title="خطای ۴۰۴" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Erreur_HTTP_404" title="Erreur HTTP 404 – French" lang="fr" hreflang="fr" data-title="Erreur HTTP 404" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Galician" lang="gl" hreflang="gl" data-title="HTTP 404" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Korean" lang="ko" hreflang="ko" data-title="HTTP 404" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/404_%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A5%81%E0%A4%9F%E0%A4%BF" title="404 त्रुटि – Hindi" lang="hi" hreflang="hi" data-title="404 त्रुटि" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Indonesian" lang="id" hreflang="id" data-title="HTTP 404" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Errore_404" title="Errore 404 – Italian" lang="it" hreflang="it" data-title="Errore 404" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A9%D7%92%D7%99%D7%90%D7%94_404" title="שגיאה 404 – Hebrew" lang="he" hreflang="he" data-title="שגיאה 404" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/404_%E0%B2%A6%E0%B3%8B%E0%B2%B7_(404_Error)" title="404 ದೋಷ (404 Error) – Kannada" lang="kn" hreflang="kn" data-title="404 ದೋಷ (404 Error)" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Latvian" lang="lv" hreflang="lv" data-title="HTTP 404" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/404-es_hiba" title="404-es hiba – Hungarian" lang="hu" hreflang="hu" data-title="404-es hiba" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Macedonian" lang="mk" hreflang="mk" data-title="HTTP 404" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Malayalam" lang="ml" hreflang="ml" data-title="HTTP 404" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Malay" lang="ms" hreflang="ms" data-title="HTTP 404" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Mongolian" lang="mn" hreflang="mn" data-title="HTTP 404" data-language-autonym="Монгол" data-language-local-name="Mongolian" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Burmese" lang="my" hreflang="my" data-title="HTTP 404" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmese" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Error_404" title="Error 404 – Dutch" lang="nl" hreflang="nl" data-title="Error 404" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Japanese" lang="ja" hreflang="ja" data-title="HTTP 404" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="HTTP 404" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Xato_404" title="Xato 404 – Uzbek" lang="uz" hreflang="uz" data-title="Xato 404" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pap mw-list-item"><a href="https://pap.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Papiamento" lang="pap" hreflang="pap" data-title="HTTP 404" data-language-autonym="Papiamentu" data-language-local-name="Papiamento" class="interlanguage-link-target"><span>Papiamentu</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Polish" lang="pl" hreflang="pl" data-title="HTTP 404" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Portuguese" lang="pt" hreflang="pt" data-title="HTTP 404" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Romanian" lang="ro" hreflang="ro" data-title="HTTP 404" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9E%D1%88%D0%B8%D0%B1%D0%BA%D0%B0_404" title="Ошибка 404 – Russian" lang="ru" hreflang="ru" data-title="Ошибка 404" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Albanian" lang="sq" hreflang="sq" data-title="HTTP 404" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Sinhala" lang="si" hreflang="si" data-title="HTTP 404" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Simple English" lang="en-simple" hreflang="en-simple" data-title="HTTP 404" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Napaka_404" title="Napaka 404 – Slovenian" lang="sl" hreflang="sl" data-title="Napaka 404" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%BE%DB%95%DA%B5%DB%95%DB%8C_%D9%A4%D9%A0%D9%A4" title="ھەڵەی ٤٠٤ – Central Kurdish" lang="ckb" hreflang="ckb" data-title="ھەڵەی ٤٠٤" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/HTTP_%D0%B3%D1%80%D0%B5%D1%88%D0%BA%D0%B0_404" title="HTTP грешка 404 – Serbian" lang="sr" hreflang="sr" data-title="HTTP грешка 404" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Finnish" lang="fi" hreflang="fi" data-title="HTTP 404" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/404_error" title="404 error – Swedish" lang="sv" hreflang="sv" data-title="404 error" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%8E%E0%AE%9A%E0%AF%8D.%E0%AE%9F%E0%AE%BF.%E0%AE%9F%E0%AE%BF.%E0%AE%AA%E0%AE%BF_404" title="எச்.டி.டி.பி 404 – Tamil" lang="ta" hreflang="ta" data-title="எச்.டி.டி.பி 404" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%AD%E0%B8%8A%E0%B8%97%E0%B8%B5%E0%B8%97%E0%B8%B5%E0%B8%9E%E0%B8%B5_404" title="เอชทีทีพี 404 – Thai" lang="th" hreflang="th" data-title="เอชทีทีพี 404" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Turkish" lang="tr" hreflang="tr" data-title="HTTP 404" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Ukrainian" lang="uk" hreflang="uk" data-title="HTTP 404" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Vietnamese" lang="vi" hreflang="vi" data-title="HTTP 404" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Cantonese" lang="yue" hreflang="yue" data-title="HTTP 404" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/HTTP_404" title="HTTP 404 – Chinese" lang="zh" hreflang="zh" data-title="HTTP 404" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q404#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" 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screen{html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-list-title,html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle{background:transparent!important}html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle a{color:var(--color-progressive)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-list-title,html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle{background:transparent!important}html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle a{color:var(--color-progressive)!important}}@media print{body.ns-0 .mw-parser-output .sidebar{display:none!important}}</style><table class="sidebar nomobile nowraplinks hlist"><tbody><tr><th class="sidebar-title"><a href="/wiki/HTTP" title="HTTP">HTTP</a></th></tr><tr><td class="sidebar-image"><span typeof="mw:File"><a href="/wiki/File:HTTP_logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5b/HTTP_logo.svg/180px-HTTP_logo.svg.png" decoding="async" width="180" height="96" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5b/HTTP_logo.svg/270px-HTTP_logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5b/HTTP_logo.svg/360px-HTTP_logo.svg.png 2x" data-file-width="512" data-file-height="274" /></a></span></td></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/HTTP_persistent_connection" title="HTTP persistent connection">Persistence</a></li> <li><a href="/wiki/HTTP_compression" title="HTTP compression">Compression</a></li> <li><a href="/wiki/HTTPS" title="HTTPS">HTTPS</a></li> <li><a href="/wiki/QUIC" title="QUIC">QUIC</a></li></ul></td> </tr><tr><th class="sidebar-heading"> <a href="/wiki/HTTP#Request_methods" title="HTTP">Request methods</a></th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/HTTP#Request_methods" title="HTTP">OPTIONS</a></li> <li><a href="/wiki/HTTP#Request_methods" title="HTTP">GET</a></li> <li><a href="/wiki/HTTP#Request_methods" title="HTTP">HEAD</a></li> <li><a href="/wiki/POST_(HTTP)" title="POST (HTTP)">POST</a></li> <li><a href="/wiki/HTTP#Request_methods" title="HTTP">PUT</a></li> <li><a href="/wiki/HTTP#Request_methods" title="HTTP">DELETE</a></li> <li><a href="/wiki/HTTP#Request_methods" title="HTTP">TRACE</a></li> <li><a href="/wiki/HTTP#Request_methods" title="HTTP">CONNECT</a></li> <li><a href="/wiki/PATCH_(HTTP)" title="PATCH (HTTP)">PATCH</a></li></ul></td> </tr><tr><th class="sidebar-heading"> <a href="/wiki/List_of_HTTP_header_fields" title="List of HTTP header fields">Header fields</a></th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/HTTP_cookie" title="HTTP cookie">Cookie</a></li> <li><a href="/wiki/HTTP_ETag" title="HTTP ETag">ETag</a></li> <li><a href="/wiki/HTTP_location" title="HTTP location">Location</a></li> <li><a href="/wiki/HTTP_referer" title="HTTP referer">HTTP referer</a></li> <li><a href="/wiki/Do_Not_Track" title="Do Not Track">DNT</a></li> <li><a href="/wiki/X-Forwarded-For" title="X-Forwarded-For">X-Forwarded-For</a></li></ul></td> </tr><tr><th class="sidebar-heading"> <a href="/wiki/List_of_HTTP_status_codes" title="List of HTTP status codes">Response status codes</a></th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/HTTP_301" title="HTTP 301">301 Moved Permanently</a></li> <li><a href="/wiki/HTTP_302" title="HTTP 302">302 Found</a></li> <li><a href="/wiki/HTTP_303" title="HTTP 303">303 See Other</a></li> <li><a href="/wiki/HTTP_403" title="HTTP 403">403 Forbidden</a></li> <li><a class="mw-selflink selflink">404 Not Found</a></li> <li><a href="/wiki/HTTP_451" title="HTTP 451">451 Unavailable for Legal Reasons</a></li></ul></td> </tr><tr><th class="sidebar-heading"> Security access control methods</th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/Basic_access_authentication" title="Basic access authentication">Basic access authentication</a></li> <li><a href="/wiki/Digest_access_authentication" title="Digest access authentication">Digest access authentication</a></li></ul></td> </tr><tr><th class="sidebar-heading"> Security vulnerabilities</th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/HTTP_header_injection" title="HTTP header injection">HTTP header injection</a></li> <li><a href="/wiki/HTTP_request_smuggling" title="HTTP request smuggling">HTTP request smuggling</a></li> <li><a href="/wiki/HTTP_response_splitting" title="HTTP response splitting">HTTP response splitting</a></li> <li><a href="/wiki/HTTP_parameter_pollution" title="HTTP parameter pollution">HTTP parameter pollution</a></li></ul></td> </tr><tr><td class="sidebar-navbar"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:HTTP" title="Template:HTTP"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:HTTP" title="Template talk:HTTP"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:HTTP" title="Special:EditPage/Template:HTTP"><abbr title="Edit this template">e</abbr></a></li></ul></div></td></tr></tbody></table> <p> In <a href="/wiki/Data_communication" title="Data communication">computer network communications</a>, the <b>HTTP 404</b>, <b>404 not found</b>, <b>404</b>, <b>404 error</b>, <b>page not found</b>, or <b>file not found</b> <a href="/wiki/Error_message" title="Error message">error message</a> is a <a href="/wiki/Hypertext_transfer_protocol" class="mw-redirect" title="Hypertext transfer protocol">hypertext transfer protocol</a> (HTTP) <a href="/wiki/List_of_HTTP_status_codes" title="List of HTTP status codes">standard response code</a>, to indicate that the <a href="/wiki/Web_browser" title="Web browser">browser</a> was able to communicate with a given <a href="/wiki/Server_(computing)" title="Server (computing)">server</a>, but the server could not find what was requested. The error may also be used when a server does not wish to disclose whether it has the requested information.<sup id="cite_ref-section-654_1-0" class="reference"><a href="#cite_note-section-654-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>The website hosting server will typically generate a "404 Not Found" web page when a user attempts to follow a <a href="/wiki/Link_rot" title="Link rot">broken or dead link</a>; hence the 404 error is one of the most recognizable errors encountered on the <a href="/wiki/World_Wide_Web" title="World Wide Web">World Wide Web</a>. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Wikimedia_error_404.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Wikimedia_error_404.png/220px-Wikimedia_error_404.png" decoding="async" width="220" height="85" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Wikimedia_error_404.png/330px-Wikimedia_error_404.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Wikimedia_error_404.png/440px-Wikimedia_error_404.png 2x" data-file-width="670" data-file-height="258" /></a><figcaption><a href="/wiki/English_Wikipedia" title="English Wikipedia">English Wikipedia</a>'s 404 page</figcaption></figure> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Overview">Overview</h2></div> <p>When communicating via HTTP, a server is required to respond to a request, such as a <a href="/wiki/Web_browser" title="Web browser">web browser</a> request for a <a href="/wiki/Web_page" title="Web page">web page</a>, with a numeric response code and an optional, mandatory, or disallowed (based upon the status code) message. In code 404, the first digit indicates a client error, such as a mistyped <a href="/wiki/Uniform_Resource_Locator" class="mw-redirect" title="Uniform Resource Locator">Uniform Resource Locator</a> (URL). The following two digits indicate the specific error encountered. HTTP's use of three-digit codes is similar to the use of such codes in earlier protocols such as <a href="/wiki/File_Transfer_Protocol" title="File Transfer Protocol">FTP</a> and <a href="/wiki/Network_News_Transfer_Protocol" title="Network News Transfer Protocol">NNTP</a>. At the HTTP level, a 404 response code is followed by a human-readable "reason phrase". The HTTP specification suggests the phrase "Not Found"<sup id="cite_ref-section-654_1-1" class="reference"><a href="#cite_note-section-654-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> and many web servers by default issue an HTML page that includes both the 404 code and the "Not Found" phrase. </p><p>A 404 error is often returned when pages have been moved or deleted. In the first case, it is better to employ <a href="/wiki/URL_mapping" class="mw-redirect" title="URL mapping">URL mapping</a> or <a href="/wiki/URL_redirection" title="URL redirection">URL redirection</a> by returning a 301 Moved Permanently response, which can be configured in most server configuration files, or through <a href="/wiki/URL_rewriting" class="mw-redirect" title="URL rewriting">URL rewriting</a>; in the second case, a 410 Gone should be returned. Because these two options require special server configuration, most websites do not make use of them. </p><p>404 errors should not be confused with <a href="/wiki/Domain_Name_System" title="Domain Name System">DNS</a> errors, which appear when the given URL refers to a server name that does not exist. A 404 error indicates that the server itself was found, but that the server was not able to retrieve the requested page. </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2></div> <p>The term "404 Not Found" was coined by the creator of HTTP <a href="/wiki/Tim_Berners-Lee" title="Tim Berners-Lee">Tim Berners-Lee</a>, who explained in a 1998 interview that he wanted to make the error message "slightly apologetic".<sup id="cite_ref-etc.usf.edu_2-0" class="reference"><a href="#cite_note-etc.usf.edu-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> He also said that he considered using "400 Bad Request" instead, but decided that it was too vague and technical.<sup id="cite_ref-etc.usf.edu_2-1" class="reference"><a href="#cite_note-etc.usf.edu-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>The first documented case of a 404 error appearing on a web page was in 1993, when a user tried to access a page about the <a href="/wiki/Mosaic_(web_browser)" class="mw-redirect" title="Mosaic (web browser)">Mosaic web browser</a> on the NCSA website. The page had been moved to a different location, but the link had not been updated.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The user reported the error to the NCSA team, who fixed the link and added a humorous message to their 404 page: "We're sorry, but the document you requested is not here. Maybe you should try someplace else."<sup id="cite_ref-etc.usf.edu_2-2" class="reference"><a href="#cite_note-etc.usf.edu-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Since then, 404 errors have become one of the most common and recognizable errors on the Web. Many websites have customized their 404 pages with creative designs, messages, or features to entertain or assist their visitors. For example, Google's 404 page features a broken robot and a link to its homepage,<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> while GitHub's 404 page shows a random image of a parallax star field and a link to its status page.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Some websites have also used their 404 pages to showcase their brand personality, humor, or social causes. For instance, Lego's 404 page shows the Lego minifigure Emmet along with a humorous message,<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Amazon's displays the image of a dog,<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Peugeot" title="Peugeot">Peugeot</a>'s shows a picture of its <a href="/wiki/Peugeot_404" title="Peugeot 404">404</a> model, <sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> and <a href="/wiki/RT%C3%89" title="RTÉ">RTÉ</a>'s shows an image of <a href="/wiki/Bosco_(TV_series)" title="Bosco (TV series)">Bosco</a>.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Soft_404_errors">Soft 404 errors</h2></div> <p><span class="anchor" id="Soft_404"></span> </p><p>Some websites report a "not found" error by returning a standard web page with a "200 OK" response code, falsely reporting that the page loaded properly; this is known as a <i>soft 404</i>. The term "soft 404" was introduced in 2004 by Ziv Bar-Yossef <i>et al</i>.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>Soft 404s are problematic for automated methods of discovering whether a link is broken. Some search engines, like <a href="/wiki/Yahoo" title="Yahoo">Yahoo</a> and <a href="/wiki/Google" title="Google">Google</a>, use automated processes to detect soft 404s.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Soft 404s can occur as a result of configuration errors when using certain HTTP server software, for example with the <a href="/wiki/Apache_HTTP_Server" title="Apache HTTP Server">Apache</a> software, when an Error Document 404 (specified in a <a href="/wiki/.htaccess" title=".htaccess">.htaccess</a> file) is specified as an absolute path (e.g. http://example.com/error.html) rather than a relative path (/error.html).<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> This can also be done on purpose to force some browsers (like <a href="/wiki/Internet_Explorer" title="Internet Explorer">Internet Explorer</a>) to display a customized 404 error message rather than replacing what is served with a browser-specific "friendly" error message (in Internet Explorer, this behavior is triggered when a 404 is served and the received HTML is shorter than a certain length, and can be manually disabled by the user). </p><p>There are also "soft 3XX" errors where content is returned with a status 200 but comes from a redirected page, such as when missing pages are redirected to the domain root/home page. </p> <div class="mw-heading mw-heading3"><h3 id="Proxy_servers">Proxy servers</h3></div> <p>Some <a href="/wiki/Proxy_server" title="Proxy server">proxy servers</a> generate a 404 error when a <a href="/wiki/List_of_HTTP_status_codes#5xx_server_errors" title="List of HTTP status codes">500-range error code</a> would be more correct. If the proxy server is unable to satisfy a request for a page because of a problem with the remote host (such as hostname resolution failures or refused TCP connections), this should be described as a 5xx Internal Server Error, but might deliver a 404 instead. This can confuse programs that expect and act on specific responses, as they can no longer easily distinguish between an absent web server and a missing web page on a web server that is present. </p> <div class="mw-heading mw-heading3"><h3 id="Intentional_404s">Intentional 404s</h3></div> <p>In July 2004, the UK telecom provider <a href="/wiki/BT_Group" title="BT Group">BT Group</a> deployed the <a href="/wiki/Cleanfeed_(content_blocking_system)" title="Cleanfeed (content blocking system)">Cleanfeed</a> content blocking system, which returns a 404 error to any request for content identified as potentially illegal by the <a href="/wiki/Internet_Watch_Foundation" title="Internet Watch Foundation">Internet Watch Foundation</a>.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> Other ISPs return a <a href="/wiki/HTTP_403" title="HTTP 403">HTTP 403</a> "forbidden" error in the same circumstances.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> The practice of employing fake 404 errors as a means to conceal <a href="/wiki/Censorship" title="Censorship">censorship</a> has also been reported in <a href="/wiki/Thailand" title="Thailand">Thailand</a><sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> and <a href="/wiki/Tunisia" title="Tunisia">Tunisia</a>.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> In Tunisia, where censorship was severe before the <a href="/wiki/Tunisian_Revolution" class="mw-redirect" title="Tunisian Revolution">2011 revolution</a>, people became aware of the nature of the fake 404 errors and created an imaginary character named "<a href="/wiki/Ammar_404#Censorship_during_the_Ben_Ali_regime" class="mw-redirect" title="Ammar 404">Ammar 404</a>" who represents "the invisible censor".<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Microsoft_Internet_Server_404_substatus_error_codes">Microsoft Internet Server 404 substatus error codes</h2></div> <p>The webserver software developed by Microsoft, <a href="/wiki/Internet_Information_Services" title="Internet Information Services">Microsoft's Internet Information Services</a> (IIS), returns a set of substatus codes with its 404 responses. The substatus codes take the form of decimal numbers appended to the 404 status code. The substatus codes are not officially recognized by <a href="/wiki/Internet_Assigned_Numbers_Authority" title="Internet Assigned Numbers Authority">IANA</a> and are not returned by non-Microsoft servers. </p> <div class="mw-heading mw-heading3"><h3 id="Substatus_codes">Substatus codes</h3></div> <p>Microsoft's IIS 7.0, IIS 7.5, and IIS 8.0 servers define the following HTTP substatus codes to indicate a more specific cause of a 404 error: </p> <ul><li>404.0 – Not found.</li> <li>404.1 – Site Not Found.</li> <li>404.2 – <a href="/wiki/ISAPI" class="mw-redirect" title="ISAPI">ISAPI</a> or <a href="/wiki/Common_Gateway_Interface" title="Common Gateway Interface">CGI</a> restriction.</li> <li>404.3 – <a href="/wiki/MIME" title="MIME">MIME</a> type restriction.</li> <li>404.4 – No handler configured.</li> <li>404.5 – Denied by request filtering configuration.</li> <li>404.6 – Verb denied.</li> <li>404.7 – File extension denied.</li> <li>404.8 – Hidden namespace.</li> <li>404.9 – File attribute hidden.</li> <li>404.10 – Request header too long.</li> <li>404.11 – Request contains double escape sequence.</li> <li>404.12 – Request contains high-bit characters.</li> <li>404.13 – Content length too large.</li> <li>404.14 – Request URL too long.</li> <li>404.15 – Query string too long.</li> <li>404.16 – DAV request sent to the static file handler.</li> <li>404.17 – Dynamic content mapped to the static file handler via a wildcard MIME mapping.</li> <li>404.18 – Query string sequence denied.</li> <li>404.19 – Denied by filtering rule.</li> <li>404.20 – Too Many URL Segments.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Custom_error_pages">Custom error pages</h2></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Wikimedia_error_404.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Wikimedia_error_404.png/220px-Wikimedia_error_404.png" decoding="async" width="220" height="85" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Wikimedia_error_404.png/330px-Wikimedia_error_404.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Wikimedia_error_404.png/440px-Wikimedia_error_404.png 2x" data-file-width="670" data-file-height="258" /></a><figcaption>The Wikimedia 404 message</figcaption></figure> <p><a href="/wiki/Web_server" title="Web server">Web servers</a> can typically be configured to display a customised 404 error page, including a more natural description, the parent site's branding, and sometimes a site map, a search form or 404-page widget. The protocol level phrase, which is hidden from the user, is rarely customized. <a href="/wiki/Internet_Explorer" title="Internet Explorer">Internet Explorer</a>, however, will not display custom pages unless they are larger than 512 bytes, opting instead to display a "friendly" error page.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Google_Chrome" title="Google Chrome">Google Chrome</a> included similar functionality, where the 404 is replaced with alternative suggestions generated by Google algorithms, if the page is under 512 bytes in size.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> Another problem is that if the page does not provide a <a href="/wiki/Favicon" title="Favicon">favicon</a>, and a separate custom 404-page exists, extra traffic and longer loading times will be generated on every page view.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p><p>Many organizations use 404 error pages as an opportunity to inject humor into what may otherwise be a serious website. For example, Metro UK shows a polar bear on a skateboard, and the web development agency Left Logic has a simple drawing program.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> During the <a href="/wiki/2015_United_Kingdom_general_election" title="2015 United Kingdom general election">2015 UK general election</a> campaign the main political parties all used their 404 pages to either take aim at political opponents or show relevant policies to potential supporters.<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> In Europe, the <a href="/wiki/NotFound_project" class="mw-redirect" title="NotFound project">NotFound project</a>, created by multiple European organizations including <a href="/wiki/Missing_Children_Europe" title="Missing Children Europe">Missing Children Europe</a> and <a href="/wiki/Child_Focus" title="Child Focus">Child Focus</a>, encourages site operators to add a <a href="/wiki/Snippet_(programming)" title="Snippet (programming)">snippet of code</a> to serve customized 404 error pages<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> which provide data about <a href="/wiki/Missing_children" class="mw-redirect" title="Missing children">missing children</a>.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p><p>While many websites send additional information in a 404 error message—such as a link to the <a href="/wiki/Homepage" class="mw-redirect" title="Homepage">homepage</a> of a website or a search box—some also endeavor to find the correct web page the user wanted. Extensions are available for some <a href="/wiki/Content_management_system" title="Content management system">content management systems</a> (CMSs) to do this.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Tracking_404_errors">Tracking 404 errors</h2></div> <p>A number of tools exist that crawl through a website to find pages that return 404 status codes. These tools can be helpful in finding links that exist within a particular website. The limitation of these tools is that they only find links within one particular website, and ignore 404s resulting from links on other websites. As a result, these tools miss out on 83% of the 404s on websites.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> One way around this is to find 404 errors by analyzing external links.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> </p><p>One of the most effective ways to discover 404 errors is by using <a href="/wiki/Google_Search_Console" title="Google Search Console">Google Search Console</a>, <a href="/wiki/Google_Analytics" title="Google Analytics">Google Analytics</a> or crawling software. </p><p>Another common method is tracking traffic to 404 pages using log file analysis.<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> This can be useful to understand more about what 404s users reached on the site. Another method of tracking traffic to 404 pages is using JavaScript-based traffic tracking tools.<sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div> <style data-mw-deduplicate="TemplateStyles:r1239009302">.mw-parser-output .portalbox{padding:0;margin:0.5em 0;display:table;box-sizing:border-box;max-width:175px;list-style:none}.mw-parser-output .portalborder{border:1px solid var(--border-color-base,#a2a9b1);padding:0.1em;background:var(--background-color-neutral-subtle,#f8f9fa)}.mw-parser-output .portalbox-entry{display:table-row;font-size:85%;line-height:110%;height:1.9em;font-style:italic;font-weight:bold}.mw-parser-output .portalbox-image{display:table-cell;padding:0.2em;vertical-align:middle;text-align:center}.mw-parser-output .portalbox-link{display:table-cell;padding:0.2em 0.2em 0.2em 0.3em;vertical-align:middle}@media(min-width:720px){.mw-parser-output .portalleft{clear:left;float:left;margin:0.5em 1em 0.5em 0}.mw-parser-output .portalright{clear:right;float:right;margin:0.5em 0 0.5em 1em}}</style><ul role="navigation" aria-label="Portals" class="noprint portalbox portalborder portalright"> <li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Crystal_Clear_app_linneighborhood.svg" class="mw-file-description"><img alt="icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Crystal_Clear_app_linneighborhood.svg/28px-Crystal_Clear_app_linneighborhood.svg.png" decoding="async" width="28" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Crystal_Clear_app_linneighborhood.svg/42px-Crystal_Clear_app_linneighborhood.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Crystal_Clear_app_linneighborhood.svg/56px-Crystal_Clear_app_linneighborhood.svg.png 2x" data-file-width="407" data-file-height="407" /></a></span></span><span class="portalbox-link"><a href="/wiki/Portal:Internet" title="Portal:Internet">Internet portal</a></span></li><li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Octicons-terminal.svg" class="mw-file-description"><img alt="icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Octicons-terminal.svg/24px-Octicons-terminal.svg.png" decoding="async" width="24" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Octicons-terminal.svg/37px-Octicons-terminal.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Octicons-terminal.svg/49px-Octicons-terminal.svg.png 2x" data-file-width="896" data-file-height="1024" /></a></span></span><span class="portalbox-link"><a href="/wiki/Portal:Computer_programming" title="Portal:Computer programming">Computer programming portal</a></span></li></ul> <ul><li><a href="/wiki/Blue_screen_of_death" title="Blue screen of death">Blue screen of death</a></li> <li><a href="/wiki/Funky_caching" title="Funky caching">Funky caching</a></li> <li><a href="/wiki/Link_rot" title="Link rot">Link rot</a></li> <li><a href="/wiki/List_of_HTTP_status_codes" title="List of HTTP status codes">List of HTTP status codes</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-section-654-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-section-654_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-section-654_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFFieldingReschke2014" class="citation cs1">Fielding, R; Reschke, J, eds. (June 2014). <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.4">"404 Not Found"</a>. <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7231"><i>HTTP/1.1 Semantics and Content</i></a>. Internet Engineering Task Force (IETF). sec. 6.5.4. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.17487%2FRFC7231">10.17487/RFC7231</a></span>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:14399078">14399078</a>. <a href="/wiki/Request_for_Comments" title="Request for Comments">RFC</a> <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7231">7231</a><span class="reference-accessdate">. Retrieved <span class="nowrap">13 December</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=404+Not+Found&rft.btitle=HTTP%2F1.1+Semantics+and+Content&rft.pages=sec.-6.5.4&rft.pub=Internet+Engineering+Task+Force+%28IETF%29&rft.date=2014-06&rft_id=info%3Adoi%2F10.17487%2FRFC7231&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A14399078%23id-name%3DS2CID&rft_id=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Frfc7231%26%23035%3Bsection-6.5.4&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-etc.usf.edu-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-etc.usf.edu_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-etc.usf.edu_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-etc.usf.edu_2-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://etc.usf.edu/techease/win/internet/what-is-a-404-error-and-what-should-i-do-if-i-get-one/">"What is a 404 error and what should I do if I get one? » Internet » Windows » Tech Ease"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">19 May</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=What+is+a+404+error+and+what+should+I+do+if+I+get+one%3F+%C2%BB+Internet+%C2%BB+Windows+%C2%BB+Tech+Ease&rft_id=https%3A%2F%2Fetc.usf.edu%2Ftechease%2Fwin%2Finternet%2Fwhat-is-a-404-error-and-what-should-i-do-if-i-get-one%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.justinmind.com/blog/best-404-pages/">"404 page design: best practices and awesome examples"</a>. <i>Justinmind</i><span class="reference-accessdate">. Retrieved <span class="nowrap">19 May</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Justinmind&rft.atitle=404+page+design%3A+best+practices+and+awesome+examples&rft_id=https%3A%2F%2Fwww.justinmind.com%2Fblog%2Fbest-404-pages%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://google.com/404">"Google 404 Error Page"</a>. <i>Google</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Google&rft.atitle=Google+404+Error+Page&rft_id=http%3A%2F%2Fgoogle.com%2F404&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://github.com/404">"Github 404 Error Page"</a>. <i>Github</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Github&rft.atitle=Github+404+Error+Page&rft_id=https%3A%2F%2Fgithub.com%2F404&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.lego.com/en-in/404">"LEGO 404 Error Page"</a>. <i>Lego</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Lego&rft.atitle=LEGO+404+Error+Page&rft_id=https%3A%2F%2Fwww.lego.com%2Fen-in%2F404&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.amazon.com/404">"Amazon's 404 error page"</a>. <i>Amazon</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Amazon&rft.atitle=Amazon%27s+404+error+page&rft_id=https%3A%2F%2Fwww.amazon.com%2F404&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.peugeot.com/404">"Peugeot's 404 error page"</a>. <i>Peugeot</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Peugeot&rft.atitle=Peugeot%27s+404+error+page&rft_id=https%3A%2F%2Fwww.peugeot.com%2F404&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFNeylon2011" class="citation web cs1">Neylon, Michele (7 August 2011). <a rel="nofollow" class="external text" href="https://michele.blog/rtes-404-keeps-bosco-alive/">"RTE's 404 Keeps Bosco Alive"</a>. <i>Michele Neylon :: Pensieri</i><span class="reference-accessdate">. Retrieved <span class="nowrap">21 December</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Michele+Neylon+%3A%3A+Pensieri&rft.atitle=RTE%27s+404+Keeps+Bosco+Alive&rft.date=2011-08-07&rft.aulast=Neylon&rft.aufirst=Michele&rft_id=https%3A%2F%2Fmichele.blog%2Frtes-404-keeps-bosco-alive%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.rte.ie/404">"RTÉ's 404 error page"</a>. <i>RTÉ.ie</i><span class="reference-accessdate">. Retrieved <span class="nowrap">21 December</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=RT%C3%89.ie&rft.atitle=RT%C3%89%27s+404+error+page&rft_id=https%3A%2F%2Fwww.rte.ie%2F404&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFZiv_Bar-YossefAndrei_Z._BroderRavi_KumarAndrew_Tompkins2004" class="citation book cs1">Ziv Bar-Yossef; Andrei Z. Broder; Ravi Kumar; Andrew Tompkins (2004). "Sic transit gloria telae". <i>Proceedings of the 13th international conference on World Wide Web</i>. pp. 328–337. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1145%2F988672.988716">10.1145/988672.988716</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-1581138443" title="Special:BookSources/978-1581138443"><bdi>978-1581138443</bdi></a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:587547">587547</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Sic+transit+gloria+telae&rft.btitle=Proceedings+of+the+13th+international+conference+on+World+Wide+Web&rft.pages=328-337&rft.date=2004&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A587547%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1145%2F988672.988716&rft.isbn=978-1581138443&rft.au=Ziv+Bar-Yossef&rft.au=Andrei+Z.+Broder&rft.au=Ravi+Kumar&rft.au=Andrew+Tompkins&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20140715000803/http://help.yahoo.com/l/nl/yahoo/ysearch/slurp/slurp-10.html">"Why is your crawler asking for strange URLs that have never existed on my site?"</a>. Yahoo Ysearch Help page. Archived from <a rel="nofollow" class="external text" href="http://help.yahoo.com/l/nl/yahoo/ysearch/slurp/slurp-10.html">the original</a> on 15 July 2014<span class="reference-accessdate">. Retrieved <span class="nowrap">4 September</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Why+is+your+crawler+asking+for+strange+URLs+that+have+never+existed+on+my+site%3F&rft.pub=Yahoo+Ysearch+Help+page&rft_id=http%3A%2F%2Fhelp.yahoo.com%2Fl%2Fnl%2Fyahoo%2Fysearch%2Fslurp%2Fslurp-10.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://googlewebmastercentral.blogspot.com/2008/08/farewell-to-soft-404s.html">"Farewell to soft 404s"</a>. Google Official Blog<span class="reference-accessdate">. Retrieved <span class="nowrap">20 September</span> 2008</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Farewell+to+soft+404s&rft.pub=Google+Official+Blog&rft_id=http%3A%2F%2Fgooglewebmastercentral.blogspot.com%2F2008%2F08%2Ffarewell-to-soft-404s.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110513071912/https://publicaffairs.linx.net/news/?p=154">"LINX Public Affairs » Cleanfeed: the facts"</a>. Publicaffairs.linx.net. 10 September 2004. Archived from <a rel="nofollow" class="external text" href="https://publicaffairs.linx.net/news/?p=154">the original</a> on 13 May 2011<span class="reference-accessdate">. Retrieved <span class="nowrap">6 March</span> 2011</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=LINX+Public+Affairs+%C2%BB+Cleanfeed%3A+the+facts&rft.pub=Publicaffairs.linx.net&rft.date=2004-09-10&rft_id=https%3A%2F%2Fpublicaffairs.linx.net%2Fnews%2F%3Fp%3D154&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://airbrake.io/blog/http-errors/403-forbidden-error">"DEMON – Error 403"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">14 June</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=DEMON+%E2%80%93+Error+403&rft_id=https%3A%2F%2Fairbrake.io%2Fblog%2Fhttp-errors%2F403-forbidden-error&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSambandaraksa2009" class="citation news cs1">Sambandaraksa, Don (18 February 2009). <a rel="nofollow" class="external text" href="http://www.bangkokpost.com/tech/technews/11872/the-old-fake-404-not-found-routine">"The old fake '404 Not Found' routine - Dead link"</a>. <i>Bangkok Post</i><span class="reference-accessdate">. Retrieved <span class="nowrap">12 September</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Bangkok+Post&rft.atitle=The+old+fake+%27404+Not+Found%27+routine+-+Dead+link&rft.date=2009-02-18&rft.aulast=Sambandaraksa&rft.aufirst=Don&rft_id=http%3A%2F%2Fwww.bangkokpost.com%2Ftech%2Ftechnews%2F11872%2Fthe-old-fake-404-not-found-routine&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFNoman2008" class="citation web cs1">Noman, Helmi (12 September 2008). <a rel="nofollow" class="external text" href="http://opennet.net/node/950">"Tunisian journalist sues government agency for blocking Facebook, claims damage for the use of 404 error message instead of 403"</a>. Open Net Initiative<span class="reference-accessdate">. Retrieved <span class="nowrap">21 November</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Tunisian+journalist+sues+government+agency+for+blocking+Facebook%2C+claims+damage+for+the+use+of+404+error+message+instead+of+403&rft.pub=Open+Net+Initiative&rft.date=2008-09-12&rft.aulast=Noman&rft.aufirst=Helmi&rft_id=http%3A%2F%2Fopennet.net%2Fnode%2F950&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://advocacy.globalvoicesonline.org/2010/05/27/anti-censorship-movement-in-tunisia-creativity-courage-and-hope/">"Anti-censorship movement in Tunisia: creativity, courage and hope!"</a>. Global Voices Advocacy. 27 May 2010<span class="reference-accessdate">. Retrieved <span class="nowrap">28 August</span> 2010</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Anti-censorship+movement+in+Tunisia%3A+creativity%2C+courage+and+hope%21&rft.pub=Global+Voices+Advocacy&rft.date=2010-05-27&rft_id=http%3A%2F%2Fadvocacy.globalvoicesonline.org%2F2010%2F05%2F27%2Fanti-censorship-movement-in-tunisia-creativity-courage-and-hope%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-19">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20101202044514/http://blogs.msdn.com/b/ieinternals/archive/2010/08/19/http-error-pages-in-internet-explorer.aspx">"Friendly HTTP Error Pages"</a>. msdn.com. 18 August 2010. Archived from <a rel="nofollow" class="external text" href="http://blogs.msdn.com/b/ieinternals/archive/2010/08/19/http-error-pages-in-internet-explorer.aspx">the original</a> on 2 December 2010<span class="reference-accessdate">. Retrieved <span class="nowrap">14 June</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Friendly+HTTP+Error+Pages&rft.pub=msdn.com&rft.date=2010-08-18&rft_id=http%3A%2F%2Fblogs.msdn.com%2Fb%2Fieinternals%2Farchive%2F2010%2F08%2F19%2Fhttp-error-pages-in-internet-explorer.aspx&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-20">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1695">"Issue 1695: Chrome needs option to turn off "Friendly 404" displays"</a>. <i>bugs.chromium.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">25 December</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=bugs.chromium.org&rft.atitle=Issue+1695%3A+Chrome+needs+option+to+turn+off+%22Friendly+404%22+displays&rft_id=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Fdetail%3Fid%3D1695&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-21">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHeng2008" class="citation web cs1">Heng, Christopher (7 September 2008). <a rel="nofollow" class="external text" href="http://www.thesitewizard.com/archive/favicon.shtml">"What is Favicon.ico and How to Create a Favicon Icon for Your Website"</a>. <i>The Site Wizard</i><span class="reference-accessdate">. Retrieved <span class="nowrap">23 February</span> 2011</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Site+Wizard&rft.atitle=What+is+Favicon.ico+and+How+to+Create+a+Favicon+Icon+for+Your+Website&rft.date=2008-09-07&rft.aulast=Heng&rft.aufirst=Christopher&rft_id=http%3A%2F%2Fwww.thesitewizard.com%2Farchive%2Ffavicon.shtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-22"><span class="mw-cite-backlink"><b><a href="#cite_ref-22">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://internetfolks.com/dastardly-favicon-ico-found-error/">"The Dastardly "favicon.ico not found" Error"</a>. <i>Internet Folks</i>. 3 August 1999.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Internet+Folks&rft.atitle=The+Dastardly+%22favicon.ico+not+found%22+Error&rft.date=1999-08-03&rft_id=http%3A%2F%2Finternetfolks.com%2Fdastardly-favicon-ico-found-error%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-23"><span class="mw-cite-backlink"><b><a href="#cite_ref-23">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="http://metro.co.uk/2013/04/16/from-skateboarding-bears-to-missing-children-the-power-of-the-404-not-found-error-page-3591031/">"From skateboarding bears to missing children: The power of the 404 Not Found error page"</a>. Metro. 6 June 2011<span class="reference-accessdate">. Retrieved <span class="nowrap">16 April</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=From+skateboarding+bears+to+missing+children%3A+The+power+of+the+404+Not+Found+error+page&rft.date=2011-06-06&rft_id=http%3A%2F%2Fmetro.co.uk%2F2013%2F04%2F16%2Ffrom-skateboarding-bears-to-missing-children-the-power-of-the-404-not-found-error-page-3591031%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-24"><span class="mw-cite-backlink"><b><a href="#cite_ref-24">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.bbc.co.uk/newsbeat/article/32480181/the-political-page-404-war">"The political Page 404 war"</a>. <i>BBC Newsbeat</i>. 27 April 2015<span class="reference-accessdate">. Retrieved <span class="nowrap">18 May</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=BBC+Newsbeat&rft.atitle=The+political+Page+404+war&rft.date=2015-04-27&rft_id=http%3A%2F%2Fwww.bbc.co.uk%2Fnewsbeat%2Farticle%2F32480181%2Fthe-political-page-404-war&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-25"><span class="mw-cite-backlink"><b><a href="#cite_ref-25">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20140902081543/http://notfound.org/notfound">"Notfound.org"</a>. <i>notfound</i>. Archived from <a rel="nofollow" class="external text" href="http://notfound.org/notfound">the original</a> on 2 September 2014.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=notfound&rft.atitle=Notfound.org&rft_id=http%3A%2F%2Fnotfound.org%2Fnotfound&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-26"><span class="mw-cite-backlink"><b><a href="#cite_ref-26">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.bbc.com/news/technology-19741350">"Missing children messages go on 404 error pages"</a>. <i><a href="/wiki/BBC_News" title="BBC News">BBC News</a></i>. 27 September 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">20 September</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=BBC+News&rft.atitle=Missing+children+messages+go+on+404+error+pages&rft.date=2012-09-27&rft_id=https%3A%2F%2Fwww.bbc.com%2Fnews%2Ftechnology-19741350&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-27"><span class="mw-cite-backlink"><b><a href="#cite_ref-27">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSwenson2008" class="citation web cs1">Swenson, Sahala (19 August 2008). <a rel="nofollow" class="external text" href="http://googlewebmastercentral.blogspot.com/2008/08/make-your-404-pages-more-useful.html">"Make your 404 pages more useful"</a>. <i>Official Google Webmaster Central Blog</i>. Google, Inc<span class="reference-accessdate">. Retrieved <span class="nowrap">28 August</span> 2009</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Official+Google+Webmaster+Central+Blog&rft.atitle=Make+your+404+pages+more+useful&rft.date=2008-08-19&rft.aulast=Swenson&rft.aufirst=Sahala&rft_id=http%3A%2F%2Fgooglewebmastercentral.blogspot.com%2F2008%2F08%2Fmake-your-404-pages-more-useful.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-28"><span class="mw-cite-backlink"><b><a href="#cite_ref-28">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://springtrax.com/key-stats-about-404-errors/default.htm#/section4">"Sources Leading To 404s"</a>. SpringTrax<span class="reference-accessdate">. Retrieved <span class="nowrap">11 February</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Sources+Leading+To+404s&rft.pub=SpringTrax&rft_id=https%3A%2F%2Fspringtrax.com%2Fkey-stats-about-404-errors%2Fdefault.htm%23%2Fsection4&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-29"><span class="mw-cite-backlink"><b><a href="#cite_ref-29">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCushing2013" class="citation web cs1">Cushing, Anne (2 April 2013). <a rel="nofollow" class="external text" href="http://searchengineland.com/a-data-centric-approach-to-identifying-404-pages-worth-saving-152844">"A Data-Centric Approach To Identifying 404 Pages Worth Saving"</a>. Search Engine Land<span class="reference-accessdate">. Retrieved <span class="nowrap">7 June</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=A+Data-Centric+Approach+To+Identifying+404+Pages+Worth+Saving&rft.pub=Search+Engine+Land&rft.date=2013-04-02&rft.aulast=Cushing&rft.aufirst=Anne&rft_id=http%3A%2F%2Fsearchengineland.com%2Fa-data-centric-approach-to-identifying-404-pages-worth-saving-152844&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-30"><span class="mw-cite-backlink"><b><a href="#cite_ref-30">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.404errorpages.com/#tracking">"Tracking and Preventing 404 Errors"</a>. 404errorpages.com<span class="reference-accessdate">. Retrieved <span class="nowrap">7 June</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Tracking+and+Preventing+404+Errors&rft.pub=404errorpages.com&rft_id=http%3A%2F%2Fwww.404errorpages.com%2F%23tracking&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> <li id="cite_note-31"><span class="mw-cite-backlink"><b><a href="#cite_ref-31">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://springtrax.com/how-springtrax-helps/understand-your-websites-404-errors.htm">"Understand 404 Errors"</a>. SpringTrax.com<span class="reference-accessdate">. Retrieved <span class="nowrap">7 June</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Understand+404+Errors&rft.pub=SpringTrax.com&rft_id=https%3A%2F%2Fspringtrax.com%2Fhow-springtrax-helps%2Funderstand-your-websites-404-errors.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHTTP+404" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div> <ul><li><a rel="nofollow" class="external text" href="http://alistapart.com/article/amoreuseful404">A More Useful 404</a></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation cs1"><a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.4">"404 Not Found"</a>. <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7231"><i>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</i></a>. <a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">Internet Engineering Task Force</a>. sec. 6.5.4. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.17487%2FRFC7231">10.17487/RFC7231</a></span>. <a href="/wiki/Request_for_Comments" title="Request for Comments">RFC</a> <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc7231">7231</a>.</cite><span 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