.ARPA Zone Management
The .arpa domain is the “Address and Routing Parameter Area” domain and is designated to be used exclusively for Internet-infrastructure purposes. We administer the domain in cooperation with the Internet technical community through the guidance of the Internet Architecture Board. For the management guidelines and operational requirements of the .arpa domain, see RFC 3172. The .arpa domain currently includes the following second-level domains:
arpaReserved exclusively to support operationally-critical infrastructural identifier spaces as advised by the Internet Architecture Board
RFC 3172
as112.arpaFor sinking DNS traffic for reverse IP address lookups and other applications
RFC 7535
e164.arpaFor mapping E.164 numbers to Internet URIs
RFC 6116
home.arpaFor non-unique use in residential home networks
RFC 8375
in-addr-servers.arpaFor hosting authoritative name servers for the in-addr.arpa domain
RFC 5855
in-addr.arpaFor mapping IPv4 addresses to Internet domain names
RFC 1035
ip6-servers.arpaFor hosting authoritative name servers for the ip6.arpa domain
RFC 5855
ip6.arpaFor mapping IPv6 addresses to Internet domain names
RFC 3152
ipv4only.arpaFor detecting the presence of DNS64 and for learning the IPv6 prefix used for protocol translation
RFC 7050
iris.arpaFor locating Internet Registry Information Services
RFC 4698
uri.arpaFor resolving Uniform Resource Identifiers according to the Dynamic Delegation Discovery System
RFC 3405 RFC 8958
urn.arpaFor resolving Uniform Resource Names according to the Dynamic Delegation Discovery System
RFC 3405
Maintain
Changes to the .arpa zone must be coordinated manually with us.
Domain Names
Number Resources
Protocols
Protocol RegistriesTime Zone Database
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