Type
Generic
All TLDs / .arpa
What is .arpa?
The short answer
.arpa is a generic top-level domain, operated by Internet Architecture Board (IAB). It's live in the official IANA DNS root zone and open for public registration through accredited registrars — anyone can register a .arpa domain if the name is available.Source: IANA root zone database, checked October 18, 2026.
Is .arpa a real domain extension?
Yes — .arpa is a real top-level domain. It's present in the official IANA DNS root zone, which is the authoritative list of every live TLD on the internet.
Who runs .arpa?
.arpa is operated by Internet Architecture Board (IAB), per the IANA root database.
What is .arpa used for?
As an open generic extension, .arpa can be registered by anyone for any kind of website — there are no topic restrictions unless the registry sets a specific policy.
Can anyone register a .arpa domain?
Yes — .arpa is open for public registration through accredited registrars. Whether a specific name is available depends on whether someone already owns it.