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Phone Directory 406-378 Detail

State Major City Time Zone
Montana Billings Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-378 Big Sandy, MT Triangle Telephone Cooperative Assn. Chouteau Landline 02/04/1994

Other Series For Prefixes

406-3780###
406-3781###
406-3782###
406-3783###
406-3784###
406-3785###
406-3786###
406-3787###
406-3788###
406-3789###