.test

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.test
IANA -- Internet Assigned Numbers Authority
Introduced 1999
TLD type Reserved top-level domain
Status Reserved to prevent actual use
Registry IANA
Sponsoring organization None
Intended use Addresses used in internal testing, designed to never match an address in actual use on the Internet
Actual use Sometimes used in intended manner, though programmers haven't always read the applicable RFC so they sometimes use different (non-reserved) names instead, which can end up being somebody's real address
Registration restrictions No registrations are possible, as this domain is not in the root
Structure Those using it for testing can use it in any desired structure; it doesn't really exist
Documents RFC 2606
Dispute policies None
Web site None

.test is a reserved top-level domain not intended for real use in the global DNS. It was defined in June 1999 by RFC 2606, along with .invalid, .localhost, and .example. The TLD was created to provide an address space for private testing (e.g. of code) and for experimentation in areas related to DNS, such that conflict with global DNS can be avoided.

 v  d  e Generic top-level domains
Unsponsored  .biz  .com  .edu  .gov  .info  .int  .mil  .name  .net  .org
Sponsored  .aero  .cat  .coop  .jobs  .mobi  .museum  .pro  .travel
Infrastructure  .arpa  .root
Startup phase  .asia  .tel
Proposed  .berlin  .bzh  .cym  .gal  .geo  .kid  .kids  .mail  .nyc  .post  .sco  .web  .xxx
Deleted/retired  .nato
Reserved  .example  .invalid  .localhost  .test
Pseudo-domains  .bitnet  .csnet  .local  .onion  .uucp
Unofficial  see Alternative DNS roots

See also: Country code top-level domains