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Phone Directory 406-856 Detail

State Major City Time Zone
Montana Billings Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-856 Bighorn, MT Mid-rivers Telephone Cooperative Treasure Landline 02/04/1994

Other Series For Prefixes

406-8560###
406-8561###
406-8562###
406-8563###
406-8564###
406-8565###
406-8566###
406-8567###
406-8568###
406-8569###