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About Triangle Telephone Cooperative Association

Triangle Telephone Cooperative Association, operating as Triangle Communications, is a rural independent telephone cooperative and incumbent local exchange carrier (ILEC) providing wireline telecommunications services across central and eastern Montana. It primarily serves residential and business customers in 16-23 counties over 23,000 square miles with fiber-based broadband, voice, and related services. As a member-owned co-op, it focuses on rural connectivity, including middle-mile fiber networks connecting central offices.

Sources: About Us - Triangle Communications · Triangle Communications - Havre Area Chamber of Commerce · [PDF] Triangle Communications · Triangle Communications | Montana Internet and Voice

Toll-free side: Triangle Telephone Cooperative Association also operates as a toll-free RespOrg (code CJI01). View on resporgs.com →

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Carrier website

Homepage screenshot of Triangle Communication System Inc - MT itstriangle.com: opens in a new tab

HQ: Havre, MT

Satellite view of Triangle Communication System Inc - MT HQ
Satellite

Block portfolio at a glance

Block assignments by year

3 17

Area codes

NPABlocksRecentLast
406 3 · 2017-06-07

States

StateBlocksRecent
MT 3 ·

Sister OCNs in the Triangle Telephone Cooperative Association Inc group

Same customer-facing carrier, different state-registered OCN. Combined stats are on the Triangle Telephone Cooperative Association Inc group page.

OCNCompany name on fileHQ stateTotalRecent
2257 Triangle Telephone Cooperative Association Inc MT 92 ·