RDDS

The umbrella name ICANN (glossary)ICANN Internet Corporation for Assigned Names and Numbers The nonprofit that coordinates the global DNS and gTLD policy. Full definition of ICANN uses for the public services that let anyone look up how a gTLD (glossary)gTLD generic top-level domain A top-level domain not tied to a country, run under ICANN contracts. Full definition of gTLD domain is registered and who is behind it. It used to mean WHOIS (glossary)WHOIS The legacy lookup service for domain registration data, now replaced by RDAP for gTLDs. Full definition of WHOIS on port 43 (glossary)port 43 The network port of the classic text-based WHOIS service, no longer mandatory for most gTLDs. Full definition of port 43 and on the web. Since January 2025 it means RDAP (glossary)RDAP Registration Data Access Protocol The modern protocol for looking up domain registration data, replacing WHOIS. Full definition of RDAP for gTLDs, plus WHOIS for .com, .name and .post, which must still offer it.