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Phone Directory 406-623 Detail

State Major City Time Zone
Montana Billings Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
406-623 Hardin, MT Level 3 Communications Big Horn Landline 02/16/2005

Other Series For Prefixes

406-6230###
406-6231###
406-6232###
406-6233###
406-6234###
406-6235###
406-6236###
406-6237###
406-6238###
406-6239###