.invalid
.invalid
Jump to navigation
Jump to search
| Introduced | 1999 |
|---|---|
TLD type | Reserved top-level domain |
| Status | Reserved to prevent conflict and confusion |
| Intended use | When necessary to show an address guaranteed to be invalid |
| Actual use | Session Initiation Protocol, for identity protection; address munging e.g. on Usenet |
| Documents | RFC 2606 |
The name invalid is reserved by the Internet Engineering Task Force (IETF) in RFC 2606 (June 1999) as a domain name that may not be installed as a top-level domain in the Domain Name System (DNS) of the Internet.[1]
Reserved DNS names[edit]
In 1999, the Internet Engineering Task Force reserved the DNS labels .mw-parser-output .monospacedfont-family:monospace,monospaceexample, invalid, localhost, and test so that they may not be installed into the root zone of the Domain Name System.
The reasons for reservation of these top-level domain names is to reduce the likelihood of conflict and confusion.[1] This allows the use of these names for either documentation purposes or in local testing scenarios.
Purpose[edit]
This top-level domain is sometimes used as a pseudo domain name in Uniform Resource Identifiers (URIs) to convey either an error condition or in use of privacy protection. A notable instance of this usage is in the Session Initiation Protocol (SIP) where the domain name anonymous.invalid in a SIP URI indicates hiding of a caller's identity.[2]
References[edit]
^ ab RFC 2606 (BCP 32), Reserved Top Level DNS Names, D. Eastlake, A. Panitz, The Internet Society (June 1999)
^ RFC 3325, Private Extensions to the Session Initiation Protocol, C. Jennings, J. Peterson, M. Watson, The Internet Society (November 2002)
Categories:
- Top-level domains
- Internet properties established in 1999
- Computer-related introductions in 1999
(window.RLQ=window.RLQ||).push(function()mw.config.set("wgPageParseReport":"limitreport":"cputime":"0.136","walltime":"0.174","ppvisitednodes":"value":457,"limit":1000000,"ppgeneratednodes":"value":0,"limit":1500000,"postexpandincludesize":"value":30240,"limit":2097152,"templateargumentsize":"value":432,"limit":2097152,"expansiondepth":"value":7,"limit":40,"expensivefunctioncount":"value":0,"limit":500,"unstrip-depth":"value":0,"limit":20,"unstrip-size":"value":1989,"limit":5000000,"entityaccesscount":"value":0,"limit":400,"timingprofile":["100.00% 121.281 1 -total"," 39.83% 48.312 1 Template:Infobox_Top_level_domain"," 34.29% 41.592 1 Template:Infobox"," 33.64% 40.795 1 Template:GTLD"," 26.26% 31.849 1 Template:Navbox_with_collapsible_groups"," 13.29% 16.115 1 Template:Reflist"," 10.01% 12.138 5 Template:Mono"," 8.04% 9.756 2 Template:Navbox"," 2.82% 3.415 1 Template:Main_other"," 2.58% 3.133 1 Template:Template_other"],"scribunto":"limitreport-timeusage":"value":"0.032","limit":"10.000","limitreport-memusage":"value":1374172,"limit":52428800,"cachereport":"origin":"mw1332","timestamp":"20181128025107","ttl":1900800,"transientcontent":false););"@context":"https://schema.org","@type":"Article","name":".invalid","url":"https://en.wikipedia.org/wiki/.invalid","sameAs":"http://www.wikidata.org/entity/Q936463","mainEntity":"http://www.wikidata.org/entity/Q936463","author":"@type":"Organization","name":"Contributors to Wikimedia projects","publisher":"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":"@type":"ImageObject","url":"https://www.wikimedia.org/static/images/wmf-hor-googpub.png","datePublished":"2005-07-17T00:53:05Z","dateModified":"2016-11-10T01:23:43Z","headline":"domain name that may not be installed as a top-level domain"(window.RLQ=window.RLQ||).push(function()mw.config.set("wgBackendResponseTime":108,"wgHostname":"mw1323"););
