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Phone Directory 406-430 Detail

State Major City Time Zone
Montana Billings Mountain

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Example: (406) 430-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-430 Helena, MT Zayo Group LLC Lewis And Clark Landline 07/22/1999

Other Series For Prefixes

406-4300###
406-4301###
406-4302###
406-4303###
406-4304###
406-4305###
406-4306###
406-4307###
406-4308###
406-4309###