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: 100.in-addr.arpa organisation: 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: 5641 8 2 427eae8c8af8b3ce38b3ca2fa17643c8c35affe4e730460780158b848dad6637 whois: whois.arin.net changed: 2010-11 changed: 2026-08-27 source: IANA