A domain registry (or registry operator) is the organization responsible for maintaining the authoritative database of all domain names registered within a specific TLD. For example, Verisign operates the registry for .com and .net, while Public Interest Registry manages .org. Registries are distinct from registrars: registries maintain the database, while registrars sell domains to the public.
FAQ
What is a domain registry?
A domain registry manages the master database for a TLD. For example, Verisign is the registry for .com — they maintain the definitive list of all .com domains.