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Phone Directory 406-643 Detail

State Major City Time Zone
Montana Billings Mountain

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Example: (406) 643-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-643 Wyola, MT Zayo Group LLC Big Horn Landline 05/24/2007

Other Series For Prefixes

406-6430###
406-6431###
406-6432###
406-6433###
406-6434###
406-6435###
406-6436###
406-6437###
406-6438###
406-6439###