IP Lookup
Look up IP network registration details, ASN, ISP, approximate geolocation, reverse DNS and RDAP data.
Your IP Address (IPv4): 216.73.217.23
216.73.217.23
IP Lookup
IP Summary
- Network Range
- 216.73.216.0 - 216.73.219.255
- CIDR
- 216.73.216.0
- Network Name
- AWS-ANTHROPIC
- Type
- ASSIGNMENT
- ASN
- AS16509
- Organization
- Anthropic, Pbc
- ISP
- Amazon.com, Inc.
- Country
- United States
- Region
- Ohio
- City
- Columbus
Reverse DNS / PTR
No PTR record found. Many IP addresses do not have reverse DNS configured.
Domains Pointing to This IP (Cached)
Data comes from cached public DNS A / AAAA records that have been queried before and may be incomplete.
No known domains yet. This list will grow automatically as related domains are queried.
Raw IP RDAP Data
Raw RDAP JSON
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "216.73.216.0",
"length": 22
}
],
"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/216.73.217.23"
},
{
"href": "https://whois.arin.net/rest/poc/ANTHR5-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/216.73.217.23"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"dns",
"noc",
"administrative",
"abuse",
"routing",
"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"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"arin@anthropic.com"
],
[
"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/216.73.217.23"
},
{
"href": "https://whois.arin.net/rest/org/AP-2440",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/216.73.217.23"
}
],
"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/216.73.217.23"
},
{
"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/216.73.217.23"
},
{
"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/216.73.217.23"
}
],
"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/216.73.217.23"
}
],
"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/216.73.217.23"
}
],
"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
Is IP geolocation exact?
No. It is an estimate and can be affected by proxy services, CDNs and Anycast.
What is ASN?
ASN identifies the routing organization that announces an IP range.