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The American Registry for Internet Numbers (ARIN) is a Regional Internet Registry (RIR) incorporated in Virginia. ARIN provides services related to the technical coordination and management of Internet number resources. ARIN's Whois RESTful Web Service (Whois-RWS) is a directory service for accessing registration data contained within ARIN's registration database. The API uses RESTful protocol and responses are formatted in XML, JSON, TXT and HTML.
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