[FIG(short list)[
- [CODE[in-addr.arpa.]]
- [CODE[ip6.arpa.]]
- [CODE[e164.arpa.]]
- [CODE[uri.arpa.]]
- [CODE[urn.arpa.]]
]FIG]

[1] [CITE@en[draft-eastlake-uri-fqdn-param-00 - Considerations for URI and FQDN Protocol Parameters]]
( ([TIME[2011-05-30 21:02:06 +09:00]] 版))
<http://tools.ietf.org/html/draft-eastlake-uri-fqdn-param-00>

[2] [CITE@en[RFC 3172 - Management Guidelines & Operational Requirements for the Address and Routing Parameter Area Domain ("arpa")]]
([TIME[2017-04-16 16:12:25 +09:00]])
<https://tools.ietf.org/html/rfc3172>