Autonomous system
AS11250 TRI-STATE-G-AND-T - Tri-State Generation and Transmission Association Inc.
Unclassified ARIN
Summary
Tri-State Generation and Transmission Association, Inc.
enterprise legacy
AS11250 (TRI-STATE-G-AND-T) belongs to Tri-State Generation and Transmission Association, a not-for-profit wholesale electric power cooperative headquartered in Westminster, Colorado. It generates and transmits power to its member electric co-ops and public power districts across rural Colorado, Nebraska, New Mexico and Wyoming.
What it's used for
The internet edge of an electric utility, not a service-provider network. RIS observes 10 IPv4 prefixes carrying 2,560 addresses, one IPv6 prefix (2620:10a:e000::/40), and three observed neighbours. Three neighbours is the signature of an enterprise multihoming for resilience across a couple of transit providers. A wholesale carrier of any size accumulates hundreds. The address count matches: ten /24s is an office-and-edge footprint, and a utility's substations, SCADA and control systems sit on private WAN links rather than public space.
Every prefix RDAP resolved is registered to Tri-State itself, under the handles TRI-STATE, TRI-STATE-2 and NETBLK-TRI-STATE. Self-registered space with first-party handles across the whole inventory is a clean first-party signal and rules out the IP-leasing shape.
Notable
The routed space comes from two unrelated blocks, 198.176.240.0-ish and 204.75.190.0-ish, held under separate ARIN network handles. That is the normal shape of a network that has been assigned space more than once over a long life rather than growing out of one aggregate.
Interesting
The ASN's ARIN registration dates to 1998, and unlike much of the surrounding AS11000 range it has not been recycled: the holder today is the same cooperative it was registered to. Tri-State itself predates the internet entirely, founded in 1952 to bring electricity to rural homes and farms across the West.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-06, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 5 prefixes · 2.56K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 6 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11250- Registry name
- TRI-STATE-G-AND-T
- Registrant
- Tri-State Generation and Transmission Association, Inc.
- Abuse contact
- melvinsam.charuvilayil@tristategt.org
- Registered
- 1998-06-01
- Last changed
- 2026-09-21
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 18% valid · 2 valid, 9 with no ROA
- ROAs
- 2 authorising AS11250
- ASPA
- no ASPA record
- IRR
- 36% registered · 4 of 11 announcements
- Route objects
- 5 naming AS11250
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 454 networks and 1,854 prefixes, as published 2026-11-06. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere