Local Calling Guide

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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-403 0 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2006-05-08   
406-403 1 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-04-09   
406-403 2 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-07-06   
406-403 3 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-09-14   
406-403 4 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-403 5 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-403 6 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-11-23   
406-403 7 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2009-03-22   
406-403 8 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-11-23   
406-403 9 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-04-05   
406-404 A Bozeman MT BZMNMTEF2MD  792K CHARTER IP ENABLED SERVICES, LLC 650      
406-404 0 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2014-10-04   
406-404 1 Bozeman MT BZMNMTEF2MD  792K CHARTER IP ENABLED SERVICES, LLC 650   2012-06-01   
406-404 2 Bozeman MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-404 3 Bozeman MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-404 4 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2013-05-10   
406-404 5 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2014-08-05   
406-404 6 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-05-14   
406-404 7 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-05-14   
406-404 8 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-05-14   
406-404 9 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2014-10-22   
406-405 A Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960      
406-405 0 Libby MT CRALIDXXGMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2022-12-13   
406-405 1 Libby MT CRALIDXXGMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2023-07-28   
406-405 2 Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960   2022-11-06   
406-405 3 Libby MT CRALIDXXXXX  624H ONVOY SPECTRUM, LLC 960   2022-11-06   
406-405 4 Libby MT CRALIDXXKMD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 960   2023-05-14   
406-405 5 Libby MT CRALIDXXGMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2023-12-29   
406-405 6 Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960   2024-04-14   
406-405 7 Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960   2024-09-29   
406-405 8 Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960   2023-08-20   
406-405 9 Libby MT CRALIDXXGMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2024-08-27   
406-406 A Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 0 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 1 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 2 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 3 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 4 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 5 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 6 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 7 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 8 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 9 Missoula MT MSSLMTMADS3  509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-407 A Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-407 0 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-10-14   
406-407 1 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-02-06   
406-407 2 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-03-07   
406-407 3 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-05-05   
406-407 4 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-07   
406-407 5 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-28   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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