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Phone Directory 406-991 Detail

State Major City Time Zone
Montana Billings Mountain

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Example: (406) 991-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-991 Marion, MT Zayo Group LLC Flathead Landline 10/11/2007

Other Series For Prefixes

406-9910###
406-9911###
406-9912###
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406-9914###
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406-9918###
406-9919###