Special-use domain name

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A special-use domain name is a domain name that is defined and reserved in the hierarchy of the Domain Name System of the Internet for special purposes. The designation of a reserved special-use domain is authorized by the Internet Engineering Task Force (IETF) and executed, maintained, and published by the Internet Assigned Numbers Authority (IANA). [1]

Contents

Reserved domain names

The following list comprises the domain names list by IANA in the category of special-use domain names. [2]

DomainPurposeAuthority document
.alt preventing name collisions with DNSRFC  9476 [3]
6tisch.arpa IETF 6TiSCH working groupRFC  9031 [4]
10.in-addr.arpaprivate network reverse mappingRFC  6761 [1]
16.172.in-addr.arpa
17.172.in-addr.arpa
18.172.in-addr.arpa
19.172.in-addr.arpa
20.172.in-addr.arpa
21.172.in-addr.arpa
22.172.in-addr.arpa
23.172.in-addr.arpa
24.172.in-addr.arpa
25.172.in-addr.arpa
26.172.in-addr.arpa
27.172.in-addr.arpa
28.172.in-addr.arpa
29.172.in-addr.arpa
30.172.in-addr.arpa
31.172.in-addr.arpa
168.192.in-addr.arpa
170.0.0.192.in-addr.arpaNAT64 prefix discovery [5] RFC  8880 [6]
171.0.0.192.in-addr.arpa
ipv4only.arpa
254.169.in-addr.arpaUse in multicast DNS (mDNS)RFC  6762 [7]
8.e.f.ip6.arpa
9.e.f.ip6.arpa
a.e.f.ip6.arpa
b.e.f.ip6.arpa
.home.arpaNon-unique use on residential networksRFC  8375 [8]
.example documentation, tutorials, etc.RFC 6761
example.com use in documentation, tutorials, testingRFC 6761
example.net
example.org
.invalid Avoidance of confusion and errors [9] RFC 6761
.local Used for Multicast DNS RFC 6762: §3 
.localhost Reserved to avoidance of confusion and errorsRFC 6761
.onion Anonymous onion service RFC  7686 [10]
.test Avoidance of confusion, allowing use for documentation and network testingRFC 6761

See also

References

  1. 1 2 S. Cheshire; M. Krochmal (February 2013). Special-Use Domain Names. Internet Engineering Task Force. doi: 10.17487/RFC6761 . ISSN   2070-1721. RFC 6761.Proposed Standard. Updates RFC  1918 and 2606.
  2. ↑ "Special-Use Domain Names". Internet Assigned Number Authority. Retrieved 2020-06-16.
  3. ↑ W. Kumari; MP. Hoffman (September 2023). The .alt Special-Use Top-Level Domain. Internet Engineering Task Force. doi: 10.17487/RFC9476 . ISSN   2070-1721. RFC 9476.Proposed Standard.
  4. ↑ J. Simon; K. Pister; M. Richardson (May 2021). M. Vučinić (ed.). Constrained Join Protocol (CoJP) for 6TiSCH. Internet Engineering Task Force. doi: 10.17487/RFC9031 . ISSN   2070-1721. RFC 9031.Proposed Standard.
  5. ↑ T. Savolainen; J. Korhonen; D. Wing (November 2013). Discovery of the IPv6 Prefix Used for IPv6 Address Synthesis. Internet Engineering Task Force. doi: 10.17487/RFC7050 . ISSN   2070-1721. RFC 7050.Proposed Standard. Updated by RFC  8880.
  6. ↑ S. Cheshire; D. Schinazi (August 2020). Special Use Domain Name 'ipv4only.arpa'. Internet Engineering Task Force. doi: 10.17487/RFC8880 . ISSN   2070-1721. RFC 8880.Proposed Standard. Updates RFC  7788.
  7. ↑ S. Cheshire; M. Krochmal (February 2013). Multicast DNS. Internet Engineering Task Force. doi: 10.17487/RFC6762 . ISSN   2070-1721. RFC 6762.Proposed Standard.
  8. ↑ P. Pfister; T. Lemon (May 2018). Special-Use Domain 'home.arpa.'. Internet Engineering Task Force. doi: 10.17487/RFC8375 . ISSN   2070-1721. RFC 8375.Proposed Standard. Updates RFC  7788.
  9. ↑ D. Eastlake; A. Panitz (June 1999). Reserved Top Level DNS Names. Network Working Group. doi: 10.17487/RFC2606 . BCP 32. RFC 2606.Best Current Practice 32. Updated by RFC  6761.
  10. ↑ J. Appelbaum; A. Muffett (October 2015). The ".onion" Special-Use Domain Name. Internet Engineering Task Force. doi: 10.17487/RFC7686 . ISSN   2070-1721. RFC 7686.Proposed Standard.
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