Infrastructure extension · Technology

.arpa Domains: rules and registry

.arpa is a infrastructure top-level domain listed in the authoritative IANA Root Zone Database. Its listed manager is Internet Architecture Board (IAB).

  • RegistryInternet Architecture Board (IAB)
View registry facts

Signal profile

  • Brevity 88
  • Namespace depth 72
  • RDAP readiness 0
  • DNSSEC 100
  • NS breadth 100
  • Registration scale n/a

Choosing an extension

About .arpa domains

Infrastructure extensions support the operation of the internet and are not offered for ordinary domain registration.

Who can register a .arpa domain?

No one can register an ordinary .arpa domain. It is reserved for internet infrastructure and administered under IANA and IETF technical arrangements.

Find the registry’s website in the IANA record ↗

Can you buy a .arpa domain?

No. This namespace is not sold through retail registrars, so there are no public registration prices to compare. For a similar project, compare registration and renewal prices for an open extension instead.

Compare registrar prices for open extensions

Continue with a written guide

Understand the terminology in our explanation of what a top-level domain is.

Once a suitable name becomes available, follow our guide to registering an expired domain.

Check renewal costs and buying terms with our guide to comparing domain registrars.

Root zone and registry agreement

The facts that do not change monthly

Delegation, operator and protocol support, taken from the IANA root zone and the ICANN registry agreement data.

Registry manager
Internet Architecture Board (IAB)

IANA Root Zone Database

Authoritative nameservers
12

IANA root zone

DNSSEC signed
Yes

Root delegation DS record

RDAP available
No

IANA RDAP bootstrap registry

Internationalised label
No

IANA root zone

Namespace beneath .arpa

8 ICANN boundary rules Registration boundaries recognised beneath this TLD.

0 Private boundary rules Privately operated suffixes, such as hosting subdomains.

Put it to use

Find a domain worth having

Names under .arpa are not open to the public. Domain Hunter Gatherer finds names in open extensions that are actually available and actually worth your time.

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