ICANN Acronyms and Terms
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R
Registration Directory Services(RDS)
A set of online services that registrars and registry operators of top-level domains provide to enable public access to Domain Name Registration Data. Currently, Registration Directory Services are available for generic top-level domains through the WHOIS protocol and through HTTP-based directory services.
Individual Regional Internet Registries (RIRs) also use the Registration Directory Services to maintain a database of the Internet Protocol addresses that have been assigned in their region.