.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. It is administered by the IANA in cooperation with the Internet technical community under 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:

Domain / Usage Normative Reference
arpa Reserved exclusively to support operationally-critical infrastructural identifier spaces as advised by the Internet Architecture Board RFC 3172
e164.arpa For mapping E.164 numbers to Internet URIs RFC 6116
in-addr-servers.arpa For hosting authoritative name servers for the in-addr.arpa domain RFC 5855
in-addr.arpa For mapping IPv4 addresses to Internet domain names RFC 1035
ip6-servers.arpa For hosting authoritative name servers for the ip6.arpa domain RFC 5855
ip6.arpa For mapping IPv6 addresses to Internet domain names RFC 3152
ipv4only.arpa For detecting the presence of DNS64 and for learning the IPv6 prefix used for protocol translation RFC 7050
iris.arpa For locating Internet Registry Information Services RFC 4698
uri.arpa For resolving Uniform Resource Identifiers according to the Dynamic Delegation Discovery System RFC 3405
urn.arpa For resolving Uniform Resource Names according to the Dynamic Delegation Discovery System RFC 3405

Maintain

Changes to the .arpa zone must be coordinated manually with IANA..