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IP WHOIS
Look up who owns an IPv4 or IPv6 address — network name, organisation, country, registry, abuse contact, origin ASN and routing.
216.73.216.222
Network nameAWS-ANTHROPIC
OrganisationAnthropic, PBC
Address range216.73.216.0 – 216.73.219.255
CIDR216.73.216.0/22
Registry (RIR)ARIN
HandleNET-216-73-216-0-1
TypeASSIGNMENT
Registered05 Jun 2024
Last changed05 Jun 2024
Reverse DNS—
Abuse contact[email protected]
Routing
Announced as 216.73.216.0/22 by:
AS16509 AMAZON-02 - Amazon.com, Inc.
RPKI ValidContacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | Anthropic, PBC | AP-2440 | 548 Market St., PMB 90375, San Francisco, CA, 94104-5401, United States | |
| administrative, routing, dns, abuse, noc, technical | Anthropic | ANTHR5-ARIN | [email protected], +1-415-236-0599 | 548 Market St., PMB 90375, San Francisco, CA, 94104-5401, United States |
Raw RDAP response
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "216.73.216.0",
"length": 22
}
],
"endAddress": "216.73.219.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-18T02:54:11-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-07-31T16:45:12-04:00"
}
],
"handle": "ANTHR5-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ANTHR5-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
},
{
"href": "https://whois.arin.net/rest/poc/ANTHR5-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"routing",
"dns",
"abuse",
"noc",
"technical"
],
"status": [
"validated"
],
"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, PBC"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-415-236-0599"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-08-22T17:10:25-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-07-31T16:51:11-04:00"
}
],
"handle": "AP-2440",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/AP-2440",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
},
{
"href": "https://whois.arin.net/rest/org/AP-2440",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"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"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-06-05T12:42:32-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-06-05T12:42:32-04:00"
}
],
"handle": "NET-216-73-216-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/216.73.216.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
},
{
"href": "https://whois.arin.net/rest/net/NET-216-73-216-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
},
{
"href": "https://rdap.arin.net/registry/ip/216.73.208.0/21",
"rel": "up",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
}
],
"name": "AWS-ANTHROPIC",
"notices": [
{
"description": [
"By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/tou/",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
}
],
"title": "Terms of Service"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.arin.net/registry/ip/216.73.216.222"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-216-73-208-0-1",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "216.73.216.0",
"status": [
"active"
],
"type": "ASSIGNMENT"
}Data: RIPE NCC RIPEstat (routing & RPKI) and RDAP from the Regional Internet Registries (APNIC, ARIN, RIPE NCC, LACNIC, AFRINIC). Results are cached for up to an hour. Lookups are logged with your IP address to prevent abuse — see our Privacy Policy.