ICANN Acronyms and Terms
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The organization that maintains the master database (registry) of all domain names registered in a particular top-level domain (TLD). ROs receive requests from registrars to add, delete, or modify domain names, and they make the requested changes in the registry.
An RO also operates the TLD’s authoritative name servers and generates the zone file. This information enables recursive name servers across the Internet to translate domain names into Internet Protocol (IP) addresses, so devices on the Internet can connect to one another.