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Phone Directory 406-657 Detail

State Major City Time Zone
Montana Billings Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-657 Billings, MT Qwest Corporation Yellowstone Landline 02/04/1994

Other Series For Prefixes

406-6570###
406-6571###
406-6572###
406-6573###
406-6574###
406-6575###
406-6576###
406-6577###
406-6578###
406-6579###