AS11250
Tri-State Generation and Transmission Association, Inc.
ARIN US active Announced
More ASNs in the United States → Organization
Tri-State Generation and Transmission Association, Inc.
TRI-STATE-G-AND-T
Registered
Jun 01, 1998
28 years ago
IPv4 Prefixes
10
2,560 addresses
IPv6 Prefixes
1
256 × /48
BGP Neighbours
3
3 upstream/peer · 0 downstream
Registration
AS Number AS11250 AS Name TRI-STATE-G-AND-T Organization Tri-State Generation and Transmission Association, Inc. Organization ID TGTA Address 1100 w 116th Ave, Westminster, CO, 80234, United States Country United States (US) Registry ARIN Allocated Jun 01, 1998 Record Created Jun 01, 1998 Last Updated Sep 21, 2026 Status
active
WHOIS Server whois.arin.net AS Description TRI-STATE-G-AND-T - Tri-State Generation and Transmission Association Inc., US Abuse Email [email protected] Abuse Phone +1-720-470-0661 IPv4 Prefixes
10 prefixes · 2,560 addresses Routing data as of 2026-10-09 00:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 198.176.183.0/24 | 198.176.183.0 – 198.176.183.255 | 256 |
| 198.176.240.0/24 | 198.176.240.0 – 198.176.240.255 | 256 |
| 198.176.241.0/24 | 198.176.241.0 – 198.176.241.255 | 256 |
| 198.176.242.0/24 | 198.176.242.0 – 198.176.242.255 | 256 |
| 198.176.243.0/24 | 198.176.243.0 – 198.176.243.255 | 256 |
| 198.176.244.0/24 | 198.176.244.0 – 198.176.244.255 | 256 |
| 198.176.245.0/24 | 198.176.245.0 – 198.176.245.255 | 256 |
| 204.75.190.0/24 | 204.75.190.0 – 204.75.190.255 | 256 |
| 204.75.191.0/24 | 204.75.191.0 – 204.75.191.255 | 256 |
| 204.75.192.0/24 | 204.75.192.0 – 204.75.192.255 | 256 |
IPv6 Prefixes
1 prefix · 256 × /48 Routing data as of 2026-10-09 00:00 UTC
| Prefix | Addresses |
|---|---|
| 2620:10a:e000:: | 288 |
BGP Neighbours
3 unique neighbours · 3 upstream/peer · 0 downstream. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries. Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers. Upstream & peer side (3)
Raw RDAP Response
{
"endAutnum": 11250,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-09-21T16:01:11-04:00"
},
{
"eventAction": "registration",
"eventDate": "2026-01-27T18:31:51-05:00"
}
],
"handle": "NETWO10489-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NETWO10489-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11250"
},
{
"href": "https://whois.arin.net/rest/poc/NETWO10489-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11250"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse",
"administrative",
"dns",
"noc",
"technical",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "3761 Eureka Way\n\nFrederick\nCO\n80516\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Network Engineering"
],
[
"org",
{},
"text",
"Tri-State Generation and Transmission Association, Inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-720-470-0661"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-27T17:03:37-04:00"
},
{
"eventAction": "registration",
"eventDate": "1993-09-22T00:00:00-04:00"
}
],
"handle": "TGTA",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/TGTA",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11250"
},
{
"href": "https://whois.arin.net/rest/org/TGTA",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11250"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Tri-State Generation and Transmission Association, Inc."
],
[
"adr",
{
"label": "1100 w 116th Ave\nWestminster\nCO\n80234\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-09-21T14:19:41-04:00"
},
{
"eventAction": "registration",
"eventDate": "1998-06-01T00:00:00-04:00"
}
],
"handle": "AS11250",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/11250",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11250"
},
{
"href": "https://whois.arin.net/rest/asn/AS11250",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11250"
}
],
"name": "TRI-STATE-G-AND-T",
"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/autnum/11250"
}
],
"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/autnum/11250"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "autnum",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"nro_rdap_profile_asn_flat_0"
],
"startAutnum": 11250,
"status": [
"active"
]
} Contact details of private individuals are redacted.