Whois & RDAP Lookup
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IP Geolocation RDAPIP Range2400:cb00:: - 2400:cb00:fff:ffff:ffff:ffff:ffff:ffff
Handle2400:cb00::/36
NameCLOUDFLARE_2400_CB00_0000_36
TypeALLOCATED NON-PORTABLE
CountryUS
Registered2016-02-24 23:00 UTC
Updated2021-01-13 23:48 UTC
Admin ContactCloudflare Technical Contact
Email[email protected]
Phone+1-650-319-8930
Address101 Townsend Street, San Francisco CA 94107
Tech ContactCloudflare Technical Contact
Email[email protected]
Phone+1-650-319-8930
Address101 Townsend Street, San Francisco CA 94107
Abuse Contact[email protected]
Statusactive
Registry RDAPhttps://rdap.apnic.net
Raw WHOIS response
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to '2400:cb00::/36'
% Abuse contact for '2400:cb00::/36' is '[email protected]'
inet6num: 2400:cb00::/36
netname: CLOUDFLARE_2400_CB00_0000_36
descr: Cloudflare, Inc.
descr: 101 Townsend Street, San Francisco CA 94107
country: US
admin-c: CTC17-AP
tech-c: CTC17-AP
abuse-c: AC1914-AP
status: ALLOCATED NON-PORTABLE
mnt-by: MAINT-CLOUDFLARE-AP
mnt-irt: IRT-CLOUDFLARE-AP
last-modified: 2021-01-13T23:48:10Z
source: APNIC
irt: IRT-CLOUDFLARE-AP
address: Cloudflare, Inc.
address: 101 Townsend Street, San Francisco CA 94107
e-mail: [email protected]
abuse-mailbox: [email protected]
admin-c: CTC15-AP
tech-c: CTC15-AP
auth: # Filtered
remarks: [email protected] is invalid
remarks: [email protected] is invalid
irt-nfy: [email protected]
notify: [email protected]
mnt-by: MAINT-CLOUDFLARE-AP
last-modified: 2026-10-27T14:04:02Z
source: APNIC
role: ABUSE CLOUDFLAREAP
country: ZZ
address: Cloudflare, Inc.
address: 101 Townsend Street, San Francisco CA 94107
phone: +000000000
e-mail: [email protected]
admin-c: CTC15-AP
tech-c: CTC15-AP
nic-hdl: AC1914-AP
remarks: Generated from irt object IRT-CLOUDFLARE-AP
remarks: [email protected] is invalid
remarks: [email protected] is invalid
abuse-mailbox: [email protected]
mnt-by: APNIC-ABUSE
last-modified: 2026-10-27T14:04:37Z
source: APNIC
role: Cloudflare Technical Contact
address: 101 Townsend Street, San Francisco CA 94107
country: US
phone: +1-650-319-8930
e-mail: [email protected]
admin-c: CTC17-AP
tech-c: CTC17-AP
nic-hdl: CTC17-AP
notify: [email protected]
mnt-by: MAINT-CLOUDFLARE-AP
last-modified: 2017-09-07T21:57:11Z
source: APNIC
% Information related to '2400:cb00:472::/48AS13335'
route6: 2400:cb00:472::/48
origin: AS13335
descr: Cloudflare, Inc.
101 Townsend Street
mnt-by: MAINT-CLOUDFLARE-AP
last-modified: 2022-01-06T02:18:20Z
source: APNIC
% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-SG1)
% Query time: 496 msec
% WHEN: Wed Oct 28 16:11:17 UTC 2026Raw RDAP JSON (registry) https://rdap.apnic.net
{
"cidr0_cidrs": [
{
"length": 36,
"v6prefix": "2400:cb00::"
}
],
"country": "US",
"endAddress": "2400:cb00:fff:ffff:ffff:ffff:ffff:ffff",
"entities": [
{
"events": [
{
"eventAction": "registration",
"eventDate": "2016-02-24T01:38:33Z"
},
{
"eventAction": "last changed",
"eventDate": "2017-09-07T21:57:11Z"
}
],
"handle": "CTC17-AP",
"links": [
{
"href": "https://rdap.apnic.net/entity/CTC17-AP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/2400:cb00:472:1024::ac46:f90f"
}
],
"objectClassName": "entity",
"roles": [
"technical",
"administrative"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Cloudflare Technical Contact"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "101 Townsend Street, San Francisco CA 94107"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+1-650-319-8930"
],
[
"email",
{},
"text",
"[email protected]"
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2011-05-13T04:19:38Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-10-27T14:04:02Z"
}
],
"handle": "IRT-CLOUDFLARE-AP",
"links": [
{
"href": "https://rdap.apnic.net/entity/IRT-CLOUDFLARE-AP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/2400:cb00:472:1024::ac46:f90f"
}
],
"objectClassName": "entity",
"remarks": [
{
"description": [
"[email protected] is invalid",
"[email protected] is invalid"
],
"title": "remarks"
}
],
"roles": [
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"IRT-CLOUDFLARE-AP"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "Cloudflare, Inc.\n101 Townsend Street, San Francisco CA 94107"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{
"pref": "1"
},
"text",
"[email protected]"
]
]
]
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "2016-02-24T23:00:32Z"
},
{
"eventAction": "last changed",
"eventDate": "2021-01-13T23:48:10Z"
}
],
"handle": "2400:cb00::/36",
"ipVersion": "v6",
"links": [
{
"href": "https://rdap.apnic.net/ip/2400:cb00::/36",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/2400:cb00:472:1024::ac46:f90f"
}
],
"name": "CLOUDFLARE_2400_CB00_0000_36",
"notices": [
{
"description": [
"Objects returned came from source",
"APNIC"
],
"title": "Source"
},
{
"description": [
"This is the APNIC WHOIS Database query service. The objects are in RDAP format."
],
"links": [
{
"href": "http://www.apnic.net/db/dbcopyright.html",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.apnic.net/ip/2400:cb00:472:1024::ac46:f90f"
}
],
"title": "Terms and Conditions"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.apnic.net/ip/2400:cb00:472:1024::ac46:f90f"
}
],
"title": "Whois Inaccuracy Reporting"
}
],
"objectClassName": "ip network",
"port43": "whois.apnic.net",
"rdapConformance": [
"history_version_0",
"nro_rdap_profile_0",
"cidr0",
"rdap_level_0"
],
"remarks": [
{
"description": [
"Cloudflare, Inc.",
"101 Townsend Street, San Francisco CA 94107"
],
"title": "description"
}
],
"startAddress": "2400:cb00::",
"status": [
"active"
],
"type": "ALLOCATED NON-PORTABLE"
}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.