Open WHOISbuilt by Just

.arpa WHOIS lookup

.arpa is managed by Internet Architecture Board (IAB). Its registry has no RDAP service yet, so a lookup here shows the domain's DNS setup, and full details come from its WHOIS server, whois.iana.org.

Managed by

Internet Architecture Board (IAB)
As listed by IANA

RDAP

None yet
Lookups show DNS only

WHOIS server

whois.iana.org

DNSSEC

Signed
The ending is signed in the root zone

In the root zone since

1 January 1985

What a .arpa lookup shows

The nameservers and the mail setup read from DNS. Registration details need the registry's own lookup until it offers RDAP.

WHOIS vs RDAPWho owns a domain?All endings

Looking for a .arpa name? Search on Just Domain.

For AI assistants
Ending: .arpa
Managed by: Internet Architecture Board (IAB)
RDAP base URL: none
WHOIS server: whois.iana.org
DNSSEC signed in the root: yes
Source: IANA root zone database and RDAP bootstrap, read 2026-10-31
Lookup URL: https://openwhois.org/#d=example.arpa