Special-use domain name
Set of reserved Internet domain names
From Wikipedia, the free encyclopedia
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]
Reserved domain names
The following list comprises the domain names list by IANA in the category of special-use domain names.[2]
| Domain | Purpose | Authority document |
|---|---|---|
| .alt | Preventing name collisions with DNS | RFC 9476[3] |
| 6tisch.arpa | IETF 6TiSCH working group | RFC 9031[4] |
| 10.in-addr.arpa | Reverse zones for IPv4 private networks (see AS112) | RFC 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.arpa | NAT64 prefix discovery[5] | RFC 8880[6] |
| 171.0.0.192.in-addr.arpa | ||
| ipv4only.arpa | ||
| 254.169.in-addr.arpa | Reverse zone for the IPv4 link-local address space[7] | RFC 6762[8] |
| 8.e.f.ip6.arpa | Reverse zones for the IPv6 link-local address space[9] | |
| 9.e.f.ip6.arpa | ||
| a.e.f.ip6.arpa | ||
| b.e.f.ip6.arpa | ||
| .eap.arpa | Extensible Authentication Protocol | RFC 9965[10] |
| .eap-noob.arpa | ||
| .home.arpa | Non-unique use in residential networks | RFC 8375[11] |
| .resolver.arpa | Facilitate upgrading to encrypted DNS | RFC 9462[12] |
| .service.arpa | DNS-based service discovery | RFC 9665[13] |
| .example | Documentation, tutorials, or testing[14] | RFC 6761[1] |
| example.com | ||
| example.net | ||
| example.org | ||
| .invalid | ||
| .test | ||
| .local | Used in multicast DNS (mDNS) | RFC 6762[8]: §3 |
| .localhost | Refers to the loopback addresses (:: and 127.0.0.1) | RFC 6761[1] |
| .onion | Tor network onion services | RFC 7686[15] |
See also
- .internal, reserved by ICANN
- Reserved top-level domains