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IP numbers
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} } .anchor { content: 'ANCHOR'; position: relative; top: -100px; display: inline; } div.rttab ul { display: flex; flex-wrap: wrap; } div.rttab button, div.rttab li { color: #1f701f; font-family: arial; padding: 3px; flex: 1; word-break: normal; margin: 2px; text-align: center; border: 2px solid #1f701f; border-radius: 3px; background: #fff; color: #000; text-decoration: none; font-size: 10px; } div.rttab a { text-decoration: none; } div.rttab ul { list-style-type: none; margin: 0; padding: 0; } div.rttab li { } span.censor { background: #888; } span.censor:hover { background: none; } span.censor:hover:before { background: #f0f; content: attr(data-hover); position: absolute; overflow: visible; z-index: 2000; } span.censor:hover:before { background: #ff0; } table.protable { border-radius: 0; border-collapse: collapse; width: 100%; } table.protable tr { } table.protable td { padding: 10px; } table.protable tr:nth-child(even) td { background: #eef; } table.protable tr:nth-child(odd) td { background: #efe; } table.protable th { background: #ccc; } table.table2col { border-radius: 0; width: 500px; border: 1px solid #ccc; border-collapse:collapse; margin:0 30px; } table.table2col tr { width: 400px; } table.table2col td , table.table2col th { padding:4px 7px; } table.table2col tr.ttog0 td { background: #eef; } table.table2col tr.ttog0 th { background: #ccf; } table.table2col tr.ttog1 td { background: #efe; } table.table2col tr.ttog1 th[scope=row] { background: #cfc; } table.table2col th:not([scope=row]) { background:#ccc; } table.table2col th[scope=row] { vertical-align: top; text-align:left; width:140px; } table.table2col td { background:#f0f; } table.table2col ul { padding:0; margin:0; } table.table2col li { list-style: none; white-space: nowrap; } .button { background: #f8f8f8; border-radius: 3px; padding: 3px; } div.loginbar { background: #ccc; font-size: 10px; display: flex; justify-content: flex-end; } div.loginbar > div { flex: 1; flex-grow: 0; white-space: nowrap; } div.loginbar .button { border: none; cursor: pointer; margin: 0 5px; } div.loginbar .button a { text-decoration: none; } .img24 { width: 24px; height: 24px; display: inline-block; border: none; background: none; } .img_restore { background-image: url("data:image/svg+xml,%3Csvg fill='%23000000' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'%3E %3Cpath d='M0 0h24v24H0z' fill='none'/%3E %3Cpath d='M5 16h3v3h2v-5H5v2zm3-8H5v2h5V5H8v3zm6 11h2v-3h3v-2h-5v5zm2-11V5h-2v5h5V8h-3z'/%3E %3C/svg%3E"); } .img_fullscreen { background-image: url("data:image/svg+xml, %3Csvg fill='%23000000' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'%3E %3Cpath d='M0 0h24v24H0z' fill='none'/%3E %3Cpath d='M7 14H5v5h5v-2H7v-3zm-2-4h2V7h3V5H5v5zm12 7h-3v2h5v-5h-2v3zM14 5v2h3v3h2V5h-5z'/%3E %3C/svg%3E"); } .img_bottom { background-image: url("data:image/svg+xml, %3Csvg fill='%23000000' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'%3E %3Cpath d='M16 13h-3V3h-2v10H8l4 4 4-4zM4 19v2h16v-2H4z'/%3E %3Cpath d='M0 0h24v24H0z' fill='none'/%3E %3C/svg%3E"); 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</script> </div> </header> <main> <article id="superarticle"> <div id="supercontainer"> <div id="zzztopad" class="notinapp onew"> </div> <br/> <div itemscope itemtype="http://schema.org/WebSite"> <meta itemprop="url" content="https://www.robtex.com/"/> <script> function onsub(x) { var v=document.forms['f1'].q.value; var nurl="https://www.robtex.com/search/?q="+v; document.location=nurl; return false; } function onchg() { return false; } </script> <form id="f1" onsubmit="return onsub('')" action="https://www.robtex.com/search/" itemprop="potentialAction" itemscope itemtype="http://schema.org/SearchAction"> <meta itemprop="target" content="https://www.robtex.com/search/?q={q}"/> <div class='inputform' > <div class='inputtext' ><input id="q" oninput="return onchg();" onpropertychange="return onchg();" class="zinputtext" autocorrect="off" autocapitalize="off" spellcheck="false" placeholder="hostname, ipnumber, route or AS-number" title="domain name, ip number, as number, route" itemprop="query-input" type="text" name="q" value="" required /> </div> <div class='inputsubmit'> <input id='go' name='go' type=submit value='GO' /> </div> </div> </form> </div> <div class='zenter'> <div> </div> <div> </div> <span id="promoext"></span> <script> trypromo(); </script> </div> <div id="superdiv"> <p class="c0"><span>As explained in the section on DNS, domains can be mapped to IP-addresses using A- and AAAA-records. However, the reverse is also true; an IP-address can be pointed to a domain name. This is accomplished through reverse lookup using PTR (pointer)-records. PTR-records appear slightly different to normal IPs. For example, the IP of example.com would be represented by 10.43.0.192.in-addr.arpa. Just like domain names, this too can be split up into sections (or zones) depending on authoritative responsibility. If you query the root-servers about ‘10.43.0.192.in-addr.arpa’, they will reply with whatever information they have available to them (in this case most likely by pointing you to the ARIN’s servers for the 192.in-addr.arpa-zone).</span></p> <p class="c0"><span>You will then continue downwards, following the path, by querying those servers for information on 0.192.in-addr.arpa (or whatever the next zone is comprised of). Ultimately, you will reach the servers handling the zone file for the full IP, and the PTR will be revealed to you through an authoritative response ( → www.example.com).</span></p> <p class="c5 c0"></p> <br/></div> <div style="clear:both"></div> </div> </article> <div id='zsocial'> </div> </main> <div class="soctop"> <div id="divaddthis" class="addthis_inline_share_toolbox"></div> <div><a class="twitter-follow-button" href="https://twitter.com/robtexdotcom" data-show-screen-name="false" data-show-count="true" data-size="large"> Follow</a></div> </div> <footer> <ul> <li> <div>Robtex</div> <ul> <li><a class="rtgo" href="https://twitter.com/robtexdotcom">Twitter</a></li> <li><a class="rtgo" href="https://www.facebook.com/robtexdotcom">Facebook</a></li> <li><a class="rtgo" href="https://plus.google.com/+robtex">Google+</a></li> <li><a class="rtgo" href="https://www.linkedin.com/company/robtex">LinkedIn</a></li> </ul> </li> <li> <div>About</div> <ul> <li><a href="/">Home</a></li> <li><a href="/privacy-policy">Privacy Policy</a></li> <li><a href="/api/">API</a></li> <li><a href="/stats/">Statistics</a></li> </ul> </li> <li> <div>Sections</div> <ul> <li><a href="/dns-lookup/">DNS</a></li> <li><a href="/ip-lookup/">IP</a></li> <li><a href="/as/">AS Numbers</a></li> <li><a href="/asmacro/">AS Macros</a></li> <li><a href="/cidr/">Network Routes</a></li> <li><a href="/premium/">Premium Reports</a></li> </ul> </li> </ul> 漏 2020 Robtex <hr/> <span id="statusgif"></span> <script> //loadflags|=2; //doit(); </script> <div style=""></div> </footer> <div id="sse2"></div> <script> checkcookies(); </script> This site is protected by reCAPTCHA and the Google <a href="https://policies.google.com/privacy">Privacy Policy</a> and <a href="https://policies.google.com/terms">Terms of Service</a> apply. <style> .grecaptcha-badge { display: none; } </style> <script type="text/javascript"> var onloadCallback = function() { grecaptcha.ready(function() { grecaptcha.execute('6LcNupIUAAAAAKqpkrqfj8RXxPKYuJJ7QNnfUzoA', {action: 'hit'}) .then(function(token) { var elem = document.createElement('script'); elem.src = '/rtx/recaptcha/'+token; elem.async = true; elem.type = "text/javascript"; document.head.appendChild(elem); console.log(token); }); }); }; </script> <script src="https://www.google.com/recaptcha/api.js?onload=onloadCallback&render=6LcNupIUAAAAAKqpkrqfj8RXxPKYuJJ7QNnfUzoA" async></script> </body> </html>