Registry intelligence
Retrieve the registry allocation record associated with an IPv6 address, including network ownership and registration data.
Cached registry record
This record is a cached response from an internet number registry. It can identify the address allocation or network, but it does not identify an individual device or user.
IPv6 address
2400:cb00:17:200::38
Record source
rdap
Cached at
2026-09-15 04:01:58 UTC
Cache status
Available for direct result URLs
What WHOIS can tell you
Important limits
A registry record describes an address allocation. It can be incomplete, may represent a provider rather than an end customer, and may change as networks are reassigned. Use it alongside routing and network evidence when investigating an address.
Raw registry response
{
"rdapConformance": [
"history_version_0",
"nro_rdap_profile_0",
"cidr0",
"rdap_level_0"
],
"notices": [
{
"title": "Source",
"description": [
"Objects returned came from source",
"APNIC"
]
},
{
"title": "Terms and Conditions",
"description": [
"This is the APNIC WHOIS Database query service. The objects are in RDAP format."
],
"links": [
{
"value": "https://rdap.apnic.net/ip/2400:cb00:17:200::38",
"rel": "terms-of-service",
"href": "http://www.apnic.net/db/dbcopyright.html",
"type": "text/html"
}
]
},
{
"title": "Whois Inaccuracy Reporting",
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"value": "https://rdap.apnic.net/ip/2400:cb00:17:200::38",
"rel": "inaccuracy-report",
"href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
"type": "text/html"
}
]
}
],
"country": "US",
"name": "CLOUDFLARE_2400_CB00_0000_36",
"status": [
"active"
],
"events": [
{
"eventAction": "registration",
"eventDate": "2016-02-24T23:00:32Z"
},
{
"eventAction": "last changed",
"eventDate": "2021-01-13T23:48:10Z"
}
],
"links": [
{
"value": "https://rdap.apnic.net/ip/2400:cb00:17:200::38",
"rel": "self",
"href": "https://rdap.apnic.net/ip/2400:cb00::/36",
"type": "application/rdap+json"
}
],
"remarks": [
{
"description": [
"Cloudflare, Inc.",
"101 Townsend Street, San Francisco CA 94107"
],
"title": "description"
}
],
"entities": [
{
"roles": [
"administrative",
"technical"
],
"events": [
{
"eventAction": "registration",
"eventDate": "2016-02-24T01:38:33Z"
},
{
"eventAction": "last changed",
"eventDate": "2017-09-07T21:57:11Z"
}
],
"links": [
{
"value": "https://rdap.apnic.net/ip/2400:cb00:17:200::38",
"rel": "self",
"href": "https://rdap.apnic.net/entity/CTC17-AP",
"type": "application/rdap+json"
}
],
"handle": "CTC17-AP",
"objectClassName": "entity",
"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",
"rir@cloudflare.com"
]
]
]
},
{
"roles": [
"abuse"
],
"events": [
{
"eventAction": "registration",
"eventDate": "2011-05-13T04:19:38Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-09-09T08:46:33Z"
}
],
"links": [
{
"value": "https://rdap.apnic.net/ip/2400:cb00:17:200::38",
"rel": "self",
"href": "https://rdap.apnic.net/entity/IRT-CLOUDFLARE-AP",
"type": "application/rdap+json"
}
],
"remarks": [
{
"description": [
"rir@cloudflare.com was validated on 2026-03-25",
"abuse@cloudflare.com was validated on 2026-04-10"
],
"title": "remarks"
}
],
"handle": "IRT-CLOUDFLARE-AP",
"objectClassName": "entity",
"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",
"rir@cloudflare.com"
],
[
"email",
{
"pref": "1"
},
"text",
"abuse@cloudflare.com"
]
]
]
}
],
"handle": "2400:cb00::/36",
"type": "ALLOCATED NON-PORTABLE",
"startAddress": "2400:cb00::",
"endAddress": "2400:cb00:fff:ffff:ffff:ffff:ffff:ffff",
"objectClassName": "ip network",
"ipVersion": "v6",
"cidr0_cidrs": [
{
"v6prefix": "2400:cb00::",
"length": 36
}
],
"port43": "whois.apnic.net"
}Available registry data
Open recent cached IPv6 registry records without creating another upstream WHOIS request.