A searchable database maintained by registrars that contain information about networks, networking organizations, domain names, and the contacts associated with them for the .us and ISO 3166 country code top-level domains. Also, the protocol, or set of rules, that describes the application used to access the database.
Each registrar implements the Whois protocol and maintains a separate and distinct Whois database for its respective .us domain name registrations.
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IANA is responsible for the operation and maintenance of a number of key aspects of the DNS, including the root zone, and the .intand .arpa domains.
The DNS Root Zone IANA is the global coordinator of the DNS root. The root is the upper-most part of the DNS hierarchy, and involves delegating administrative responsibility of top-level domains, which are the last segment of a domain name, such as .us. Part of this task includes evaluating requests to change the operators of country code domains, as well as day-to-day maintenance of the details of the existing operators.
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