Whois & RDAP Lookup
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RDAPIP Range216.73.216.0 - 216.73.219.255
HandleNET-216-73-216-0-1
NameAWS-ANTHROPIC
TypeASSIGNMENT
HolderAnthropic, PBC
Registered2024-06-05 16:42 UTC
Updated2024-06-05 16:42 UTC
RegistrantAnthropic, PBC
Address548 Market St., PMB 90375, San Francisco, CA, 94104-5401, United States
Admin ContactAnthropic
Email[email protected]
Phone+1-415-236-0599
Address548 Market St., PMB 90375, San Francisco, CA, 94104-5401, United States
Tech ContactAnthropic
Email[email protected]
Phone+1-415-236-0599
Address548 Market St., PMB 90375, San Francisco, CA, 94104-5401, United States
Abuse Contact[email protected]
Abuse Phone+1-415-236-0599
Statusactive
Registry RDAPhttps://rdap.arin.net
Raw WHOIS response
# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # # start NetRange: 216.73.208.0 - 216.73.219.255 CIDR: 216.73.216.0/22, 216.73.208.0/21 NetName: AMAZO-4 NetHandle: NET-216-73-208-0-1 Parent: NET216 (NET-216-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: Amazon.com, Inc. (AMAZO-4) RegDate: 2024-03-26 Updated: 2024-03-26 Ref: https://rdap.arin.net/registry/ip/216.73.208.0 OrgName: Amazon.com, Inc. OrgId: AMAZO-4 Address: Amazon Web Services, Inc. Address: P.O. Box 81226 City: Seattle StateProv: WA PostalCode: 98108-1226 Country: US RegDate: 2005-09-29 Updated: 2026-04-17 Comment: For details of this service please see Comment: http://ec2.amazonaws.com Ref: https://rdap.arin.net/registry/entity/AMAZO-4 OrgDNSHandle: DNS1131-ARIN OrgDNSName: DNS OrgDNSPhone: +1-202-555-0000 OrgDNSEmail: ipmanagement+[email protected] OrgDNSRef: https://rdap.arin.net/registry/entity/DNS1131-ARIN OrgNOCHandle: AANO1-ARIN OrgNOCName: Amazon AWS Network Operations OrgNOCPhone: +1-206-555-0000 OrgNOCEmail: [email protected] OrgNOCRef: https://rdap.arin.net/registry/entity/AANO1-ARIN OrgRoutingHandle: IPROU3-ARIN OrgRoutingName: IP Routing OrgRoutingPhone: +1-206-555-0000 OrgRoutingEmail: [email protected] OrgRoutingRef: https://rdap.arin.net/registry/entity/IPROU3-ARIN OrgTechHandle: ANO24-ARIN OrgTechName: Amazon EC2 Network Operations OrgTechPhone: +1-206-555-0000 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN OrgRoutingHandle: ARMP-ARIN OrgRoutingName: AWS RPKI Management POC OrgRoutingPhone: +1-206-555-0000 OrgRoutingEmail: [email protected] OrgRoutingRef: https://rdap.arin.net/registry/entity/ARMP-ARIN OrgAbuseHandle: AEA8-ARIN OrgAbuseName: Amazon EC2 Abuse OrgAbusePhone: +1-206-555-0000 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/AEA8-ARIN # end # start NetRange: 216.73.216.0 - 216.73.219.255 CIDR: 216.73.216.0/22 NetName: AWS-ANTHROPIC NetHandle: NET-216-73-216-0-1 Parent: AMAZO-4 (NET-216-73-208-0-1) NetType: Reassigned OriginAS: Organization: Anthropic, PBC (AP-2440) RegDate: 2024-06-05 Updated: 2024-06-05 Ref: https://rdap.arin.net/registry/ip/216.73.216.0 OrgName: Anthropic, PBC OrgId: AP-2440 Address: 548 Market St. Address: PMB 90375 City: San Francisco StateProv: CA PostalCode: 94104-5401 Country: US RegDate: 2023-07-31 Updated: 2023-08-22 Ref: https://rdap.arin.net/registry/entity/AP-2440 OrgRoutingHandle: ANTHR5-ARIN OrgRoutingName: Anthropic OrgRoutingPhone: +1-415-236-0599 OrgRoutingEmail: [email protected] OrgRoutingRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN OrgAbuseHandle: ANTHR5-ARIN OrgAbuseName: Anthropic OrgAbusePhone: +1-415-236-0599 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN OrgTechHandle: ANTHR5-ARIN OrgTechName: Anthropic OrgTechPhone: +1-415-236-0599 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN OrgNOCHandle: ANTHR5-ARIN OrgNOCName: Anthropic OrgNOCPhone: +1-415-236-0599 OrgNOCEmail: [email protected] OrgNOCRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN OrgDNSHandle: ANTHR5-ARIN OrgDNSName: Anthropic OrgDNSPhone: +1-415-236-0599 OrgDNSEmail: [email protected] OrgDNSRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN # end # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # % Query time: 636 msec % WHEN: Wed Jul 22 20:28:03 UTC 2026
Raw RDAP JSON (registry) https://rdap.arin.net
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"length": 22,
"v4prefix": "216.73.216.0"
}
],
"endAddress": "216.73.219.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-08-14T16:34:43-04:00"
},
{
"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/216.73.216.0/22"
},
{
"href": "https://whois.arin.net/rest/poc/ANTHR5-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/216.73.216.0/22"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"routing",
"administrative",
"abuse",
"technical",
"noc",
"dns"
],
"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"
],
[
"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/216.73.216.0/22"
},
{
"href": "https://whois.arin.net/rest/org/AP-2440",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/216.73.216.0/22"
}
],
"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/216.73.216.0/22"
},
{
"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/216.73.216.0/22"
},
{
"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/216.73.216.0/22"
}
],
"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/216.73.216.0/22"
}
],
"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/216.73.216.0/22"
}
],
"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"
}Frequently asked questions
What is WHOIS?
WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.
What is RDAP, and how does it differ?
RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.
What is the difference between a registrar and a registrant?
The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.
What are nameservers?
Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.
What is DNSSEC?
DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.
Why is the contact information redacted?
Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.