IP WHOIS Lookup
See your own public IP address, or enter any IPv4 / IPv6 address or domain name: who the address block is registered to - network range, organisation, ASN and abuse contact, straight from the regional internet registry.
Your public IP address:
216.73.217.59
Examples:
8.8.8.8 · 2001:4860:4860::8888 · example.com
Only the official registry RDAP services (and, for a domain, DNS) are asked; the IP address itself is never contacted. Private, local and reserved addresses are not looked up.
Addresses of example.com
-
104.20.23.154IPv4 Look up -
172.66.147.243IPv4 Shown below -
2606:4700:10::6814:179aIPv6 Look up -
2606:4700:10::ac42:93f3IPv6 Look up
The registration data below belongs to the selected IP address (its network owner), not to the domain.
Domain registration
Who registered the domain name itself (registrar, dates, name servers) is separate data from who holds the IP network.
Registration data for 172.66.147.243
An address of example.com.
Registration data found.
RegistryARIN
CIDR172.64.0.0/13
Registered organisationCloudflare, Inc.
ASN / origin ASNot listed
Country (registry record)Not listed
Abuse contact e-mailabuse@cloudflare.com
IP WHOIS Lookup - 172.66.147.243 Domain: example.com Registry: ARIN Network range: 172.64.0.0 - 172.71.255.255 CIDR: 172.64.0.0/13 Network name: CLOUDFLARENET Network type / allocation: DIRECT ALLOCATION ASN / origin AS: Not listed Registered organisation: Cloudflare, Inc. Organisation ID: CLOUD14 Country (registry record): Not listed Registered on: 2015-02-26 Last updated: 2024-09-04 Abuse contact e-mail: abuse@cloudflare.com Registered address: 101 Townsend Street, San Francisco, CA, 94107, United States Official registry record (RDAP): https://rdap.arin.net/registry/ip/172.64.0.0 Checked at: 2026-11-05 11:36 UTC Registration data names the organisation an address block is registered to; it does not identify who is using this IP address at a given moment.
Network
- IP address
172.66.147.243- Network range
- 172.64.0.0 - 172.71.255.255
- CIDR
172.64.0.0/13- Network name
- CLOUDFLARENET
- Network handle
- NET-172-64-0-0-1
- Network type / allocation
- DIRECT ALLOCATION
- Status
- active
- Parent network
- NET-172-0-0-0-0
- ASN / origin AS
- Not listed
Registered holder
- Registered organisation
- Cloudflare, Inc.
- Organisation ID
- CLOUD14
- Country (registry record)
- Not listed
- Registered address
- 101 Townsend Street, San Francisco, CA, 94107, United States
- Registered on
- 2015-02-26
- Last updated
- 2024-09-04
Abuse and public contacts
- Abuse contact e-mail
- abuse@cloudflare.com
- Abuse contact phone
- +1-650-319-8930
- Technical contact
- Admin (ADMIN2521-ARIN) · rir@cloudflare.com
- Network operations (NOC)
- NOC (NOC11962-ARIN) · noc@cloudflare.com
- Network operations (NOC), Routing contact
- Cloudflare-NOC (CLOUD146-ARIN) · noc@cloudflare.com
- Administrative contact, Technical contact
- Admin (ADMIN2521-ARIN) · rir@cloudflare.com
Source
- Registry
- ARIN
- Official registry record (RDAP)
- https://rdap.arin.net/registry/ip/172.64.0.0
- Registry WHOIS server
- whois.arin.net
- Checked at
- 2026-11-05 11:36 UTC
Registration data names the organisation an address block is registered to; it does not identify who is using this IP address at a given moment. The registered address is the holder's postal address, not the location of the IP address.
Raw RDAP data
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "172.64.0.0",
"length": 13
}
],
"endAddress": "172.71.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-23T22:28:37-04:00"
},
{
"eventAction": "registration",
"eventDate": "2021-07-01T14:10:58-04:00"
}
],
"handle": "CLOUD146-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CLOUD146-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
},
{
"href": "https://whois.arin.net/rest/poc/CLOUD146-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "101 Townsend St\nSan Francsico\nCA\n94107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Cloudflare-NOC"
],
[
"org",
{},
"text",
"Cloudflare, Inc"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"noc@cloudflare.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-319-8930"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-09-04T13:14:53-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-02-14T19:00:47-05:00"
}
],
"handle": "ABUSE2916-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE2916-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE2916-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse"
],
"title": "Registration Comments"
},
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-09-04"
],
"title": "Unvalidated POC"
}
],
"roles": [
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "101 Townsend Street\nSan Francisco\nCA\n94107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Abuse"
],
[
"org",
{},
"text",
"Cloudflare, Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"abuse@cloudflare.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-319-8930"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-12T04:48:05-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-04-19T16:11:36-04:00"
}
],
"handle": "ADMIN2521-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ADMIN2521-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
},
{
"href": "https://whois.arin.net/rest/poc/ADMIN2521-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse"
],
"title": "Registration Comments"
}
],
"roles": [
"administrative",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "101 Townsend Street\nSan Francisco\nCA\n94107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Admin"
],
[
"org",
{},
"text",
"Cloudflare, Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"rir@cloudflare.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-319-8930"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-11-25T11:09:46-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-07-09T14:10:42-04:00"
}
],
"handle": "CLOUD14",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CLOUD14",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
},
{
"href": "https://whois.arin.net/rest/org/CLOUD14",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Cloudflare, Inc."
],
[
"adr",
{
"label": "101 Townsend Street\nSan Francisco\nCA\n94107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-09-04T13:14:53-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-02-14T19:00:47-05:00"
}
],
"handle": "ABUSE2916-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE2916-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE2916-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse"
],
"title": "Registration Comments"
},
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-09-04"
],
"title": "Unvalidated POC"
}
],
"roles": [
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "101 Townsend Street\nSan Francisco\nCA\n94107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Abuse"
],
[
"org",
{},
"text",
"Cloudflare, Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"abuse@cloudflare.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-319-8930"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-12T04:48:05-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-04-19T16:11:36-04:00"
}
],
"handle": "ADMIN2521-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ADMIN2521-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
},
{
"href": "https://whois.arin.net/rest/poc/ADMIN2521-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse"
],
"title": "Registration Comments"
}
],
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "101 Townsend Street\nSan Francisco\nCA\n94107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Admin"
],
[
"org",
{},
"text",
"Cloudflare, Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"rir@cloudflare.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-319-8930"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-30T05:15:18-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-04-19T16:25:31-04:00"
}
],
"handle": "NOC11962-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NOC11962-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
},
{
"href": "https://whois.arin.net/rest/poc/NOC11962-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse"
],
"title": "Registration Comments"
}
],
"roles": [
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "101 Townsend Street\nSan Francisco\nCA\n94107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"NOC"
],
[
"org",
{},
"text",
"Cloudflare, Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"noc@cloudflare.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-319-8930"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-09-04T07:54:28-04:00"
},
{
"eventAction": "registration",
"eventDate": "2015-02-25T20:57:09-05:00"
}
],
"handle": "NET-172-64-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/172.64.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
},
{
"href": "https://whois.arin.net/rest/net/NET-172-64-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/172.68.12.202"
}
],
"name": "CLOUDFLARENET",
"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/172.68.12.202"
}
],
"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/172.68.12.202"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-172-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"remarks": [
{
"description": [
"All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse",
"Geofeed: https://api.cloudflare.com/local-ip-ranges.csv"
],
"title": "Registration Comments"
}
],
"startAddress": "172.64.0.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
}Results are kept for a few hours, so a very recent change at the registry may not show yet.