The IANA WHOIS Service is provided using the WHOIS protocol on port 43. This web gateway will query this server and return the results. Accepted query arguments are domain names, IP addresses and AS numbers. By submitting any personal data, you acknowledge and agree that the personal data submitted will be processed in accordance with our Privacy Policy, and you agree to abide by the website Terms of Service.
% IANA WHOIS server % for more information on IANA, visit http://www.iana.org % This query returned 1 object domain: 20.in-addr.arpa organisation: Administered by ARIN nserver: arin.authdns.ripe.net. nserver: r.arin.net. nserver: u.arin.net. nserver: x.arin.net. nserver: y.arin.net. nserver: z.arin.net. ds-rdata: 39355 8 2 9813e685fefe30ce71f0f3c614d9b8b6a6e42ba2ed6d9b3fc20fd9ec5f6c6d4c whois: whois.arin.net changed: 1994-10 changed: 2026-08-27 source: IANA