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Phone Directory 406-821 Detail

State Major City Time Zone
Montana Billings Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-821 Darby, MT Qwest Corporation Ravalli Landline 02/04/1994

Other Series For Prefixes

406-8210###
406-8211###
406-8212###
406-8213###
406-8214###
406-8215###
406-8216###
406-8217###
406-8218###
406-8219###