Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 315

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-315 A Great Falls MT GRFLMTMAJMD  843H SAGEBRUSH CELLULAR, INC. 648      
406-315 0 Great Falls MT GRFLMTMAHMD  073H TELNYX LLC 648   2021-03-04   
406-315 1 Great Falls MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2011-03-10   
406-315 2 Great Falls MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2011-11-17   
406-315 3 Great Falls MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2012-05-06   
406-315 4 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-13   
406-315 5 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-13   
406-315 6 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-13   
406-315 7 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-13   
406-315 8 Great Falls MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2014-04-30   
406-315 9 Great Falls MT GRFLMTMAJMD  843H SAGEBRUSH CELLULAR, INC. 648   2017-11-05   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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