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Phone Directory 406-992 Detail

State Major City Time Zone
Montana Billings Mountain

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Example: (406) 992-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-992 Helena, MT Ymax Communications Corp. Lewis And Clark Landline 08/26/2008

Other Series For Prefixes

406-9920###
406-9921###
406-9922###
406-9923###
406-9924###
406-9925###
406-9926###
406-9927###
406-9928###
406-9929###