{"content":{"rdapConformance":["nro_rdap_profile_0","rdap_level_0","cidr0","arin_originas0"],"notices":[{"title":"Terms of Service","description":["By using the ARIN RDAP\/Whois service, you are agreeing to the RDAP\/Whois Terms of Use"],"links":[{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"terms-of-service","type":"text\/html","href":"https:\/\/www.arin.net\/resources\/registry\/whois\/tou\/"}]},{"title":"Whois Inaccuracy Reporting","description":["If you see inaccuracies in the results, please visit: "],"links":[{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"inaccuracy-report","type":"text\/html","href":"https:\/\/www.arin.net\/resources\/registry\/whois\/inaccuracy_reporting\/"}]},{"title":"Copyright Notice","description":["Copyright 1997-2025, American Registry for Internet Numbers, Ltd."]}],"handle":"NET-216-73-216-0-1","startAddress":"216.73.216.0","endAddress":"216.73.219.255","ipVersion":"v4","name":"AWS-ANTHROPIC","type":"ASSIGNMENT","parentHandle":"NET-216-73-208-0-1","events":[{"eventAction":"last changed","eventDate":"2024-06-05T12:42:32-04:00"},{"eventAction":"registration","eventDate":"2024-06-05T12:42:32-04:00"}],"links":[{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"self","type":"application\/rdap+json","href":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.0"},{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"alternate","type":"application\/xml","href":"https:\/\/whois.arin.net\/rest\/net\/NET-216-73-216-0-1"},{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"up","type":"application\/rdap+json","href":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.208.0\/21"}],"entities":[{"handle":"AP-2440","vcardArray":["vcard",[["version",[],"text","4.0"],["fn",[],"text","Anthropic, PBC"],["adr",{"label":"548 Market St.\nPMB 90375\nSan Francisco\nCA\n94104-5401\nUnited States"},"text",["","","","","","",""]],["kind",[],"text","org"]]],"roles":["registrant"],"links":[{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"self","type":"application\/rdap+json","href":"https:\/\/rdap.arin.net\/registry\/entity\/AP-2440"},{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"alternate","type":"application\/xml","href":"https:\/\/whois.arin.net\/rest\/org\/AP-2440"}],"events":[{"eventAction":"last changed","eventDate":"2023-08-22T17:10:25-04:00"},{"eventAction":"registration","eventDate":"2023-07-31T16:51:11-04:00"}],"entities":[{"handle":"ANTHR5-ARIN","vcardArray":["vcard",[["version",[],"text","4.0"],["adr",{"label":"548 Market St.\nPMB 90375\nSan Francisco\nCA\n94104-5401\nUnited States"},"text",["","","","","","",""]],["fn",[],"text","Anthropic"],["org",[],"text","Anthropic"],["kind",[],"text","group"],["email",[],"text","[email protected]"],["tel",{"type":["work","voice"]},"text","+1-415-236-0599"]]],"roles":["routing","technical","administrative","noc","abuse","dns"],"links":[{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"self","type":"application\/rdap+json","href":"https:\/\/rdap.arin.net\/registry\/entity\/ANTHR5-ARIN"},{"value":"https:\/\/rdap.arin.net\/registry\/ip\/216.73.216.216","rel":"alternate","type":"application\/xml","href":"https:\/\/whois.arin.net\/rest\/poc\/ANTHR5-ARIN"}],"events":[{"eventAction":"last changed","eventDate":"2025-08-14T16:34:43-04:00"},{"eventAction":"registration","eventDate":"2023-07-31T16:45:12-04:00"}],"status":["validated"],"port43":"whois.arin.net","objectClassName":"entity"}],"port43":"whois.arin.net","objectClassName":"entity"}],"port43":"whois.arin.net","status":["active"],"objectClassName":"ip network","cidr0_cidrs":[{"v4prefix":"216.73.216.0","length":22}],"arin_originas0_originautnums":[]}}