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
2600:387:1:824::45
Record source
rdap
Cached at
2026-09-01 18:58:00 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
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v6prefix": "2600:300::",
"length": 24
}
],
"endAddress": "2600:3ff:ffff:ffff:ffff:ffff:ffff:ffff",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-02-04T11:52:45-05:00"
},
{
"eventAction": "registration",
"eventDate": "2000-05-17T16:09:19-04:00"
}
],
"handle": "ZS44-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ZS44-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
},
{
"href": "https://whois.arin.net/rest/poc/ZS44-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"For policy abuse issues contact:",
"Email abuse@att.net. NO ATTACHMENTS. Include IP address, time/date, message header, and attack logs.",
"",
"For all Legal Inquiries contact:",
"AT&T National Compliance Center",
"11760 US Hwy 1, Suite 300",
"North Palm Beach, FL 33408",
"Phone:\t1-800-635-6840, opt 5",
"Fax:\t1-888-938-4715",
"Email:\tgldc@att.com"
],
"title": "Registration Comments"
}
],
"roles": [
"administrative",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "208 S. Akard St.\nDallas\nTX\n75202\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"IPAdmin-ATT Internet Services"
],
[
"org",
[],
"text",
"AT&T Enterprises, LLC"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"ipadmin@semail.att.com"
],
[
"email",
[],
"text",
"ipadmin@att.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-888-510-5545"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-17T09:10:06-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-05-23T17:15:05-04:00"
}
],
"handle": "ROUTI59-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ROUTI59-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
},
{
"href": "https://whois.arin.net/rest/poc/ROUTI59-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "200 S Laurel Ave\nMiddletown\nNJ\n07748\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Routing POC"
],
[
"org",
[],
"text",
"AT&T"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"routing_poc@att.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-999-999-9999"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-19T20:36:24-04:00"
},
{
"eventAction": "registration",
"eventDate": "2002-09-24T15:36:27-04:00"
}
],
"handle": "ICC-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ICC-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
},
{
"href": "https://whois.arin.net/rest/poc/ICC-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"Contact AT&T Abuse (abuse@att.net) for policy",
"issues.",
"All policy abuse issues sent to other POCs will be",
"disregarded."
],
"title": "Registration Comments"
}
],
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "200 S. Laurel AVE\nMIDDLETOWN\nNJ\n07748\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"IP Team"
],
[
"org",
[],
"text",
"AT&T WorldNet Services"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"rm-ipspecialist@att.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-888-876-2382"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-08-18T17:15:38-04:00"
},
{
"eventAction": "registration",
"eventDate": "2002-08-24T08:22:47-04:00"
}
],
"handle": "ABUSE7-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE7-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE7-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"Contact abuse@att.net for all policy abuse issues."
],
"title": "Registration Comments"
}
],
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "2701 W 15th ST\nPlano\nTX\n75075\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"abuse"
],
[
"org",
[],
"text",
"Ameritech"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"abuse@att.net"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-919-319-8167"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-05T11:57:30-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-11-22T09:44:51-05:00"
}
],
"handle": "AEL-360",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/AEL-360",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
},
{
"href": "https://whois.arin.net/rest/org/AEL-360",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"AT&T Enterprises, LLC"
],
[
"adr",
{
"label": "208 S. Akard St.\nDallas\nTX\n75202\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-03-18T15:11:52-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-10-21T15:31:58-04:00"
}
],
"handle": "NET6-2600-300-1",
"ipVersion": "v6",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/2600:300::",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
},
{
"href": "https://whois.arin.net/rest/net/NET6-2600-300-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/2600:387:f:691d::2"
}
],
"name": "ATTMOV6-1",
"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/2600:387:f:691d::2"
}
],
"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/2600:387:f:691d::2"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET6-2600-1",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "2600:300::",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
}Available registry data
Open recent cached IPv6 registry records without creating another upstream WHOIS request.