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Phone Directory 406-403 Detail

State Major City Time Zone
Montana Billings Mountain

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Example: (406) 403-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-403 Great Falls, MT Zayo Group LLC Cascade Landline 03/08/2006

Other Series For Prefixes

406-4030###
406-4031###
406-4032###
406-4033###
406-4034###
406-4035###
406-4036###
406-4037###
406-4038###
406-4039###