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Phone Directory 406-999 Detail

State Major City Time Zone
Montana Billings Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-999 Gallatin Gateway, MT Montana Opticom Gallatin Landline 07/11/2006

Other Series For Prefixes

406-9990###
406-9991###
406-9992###
406-9993###
406-9994###
406-9995###
406-9996###
406-9997###
406-9998###
406-9999###