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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
406-405 5 Libby MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2023-12-29   
406-405 6 Libby MT   453F ONVOY, LLC - MT 960   2024-04-14   
406-405 7 Libby MT   453F ONVOY, LLC - MT 960   2024-09-29   
406-405 8 Libby MT   453F ONVOY, LLC - MT 960   2023-08-20   
406-405 9 Libby MT   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   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 1 Missoula MT   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 2 Missoula MT   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 3 Missoula MT   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 4 Missoula MT   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 5 Missoula MT   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 6 Missoula MT   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 7 Missoula MT   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 8 Missoula MT   509K LIVEWIRE TELECOM, LLC 648   2025-02-01   
406-406 9 Missoula MT   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   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-10-14   
406-407 1 Kalispell MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-02-06   
406-407 2 Kalispell MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-03-07   
406-407 3 Kalispell MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-05-05   
406-407 4 Kalispell MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-07   
406-407 5 Kalispell MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-28   
406-407 6 Kalispell MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648   2010-10-26   
406-407 7 Kalispell MT   453F ONVOY, LLC - MT 648   2011-07-01   
406-407 8 Kalispell MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648   2011-07-08   
406-407 9 Kalispell MT   453F ONVOY, LLC - MT 648   2012-04-26   
406-408 A Hays MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-408 0 Hays MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2019-11-29   
406-409 A Billings MT BLNGMTASX0X  425J CSC WIRELESS, LLC 650      
406-409 0 Billings MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2021-01-17   
406-409 1 Billings MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2021-04-22   
406-409 2 Billings MT   425J CSC WIRELESS, LLC 650   2019-07-20   
406-409 3 Billings MT   453F ONVOY, LLC - MT 650   2021-07-05   
406-409 4 Billings MT   453F ONVOY, LLC - MT 650   2019-09-15   
406-409 5 Billings MT   6529 T-MOBILE USA, INC. 650   2023-01-24   
406-409 6 Billings MT   6529 T-MOBILE USA, INC. 650   2024-01-26   
406-409 7 Billings MT   453F ONVOY, LLC - MT 650   2021-07-05   
406-409 8 Billings MT   6529 T-MOBILE USA, INC. 650   2020-10-26   
406-409 9 Billings MT   6529 T-MOBILE USA, INC. 650   2020-10-26   
406-410 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-410 0 Helena MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-410 1 Helena MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-410 2 Helena MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2022-12-10   
406-410 3 Helena MT   6529 T-MOBILE USA, INC. 648   2021-06-04   
406-410 4 Helena MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2023-10-29   
406-410 5 Helena MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2023-12-07   
406-410 6 Helena MT   6529 T-MOBILE USA, INC. 648   2023-01-06   
406-410 7 Helena MT   6529 T-MOBILE USA, INC. 648   2023-01-06   
406-410 8 Helena MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2023-08-24   
406-410 9 Helena MT   939H COMMIO, LLC 648   2023-08-17   
406-412 A Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-412 0 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 1 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 2 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 3 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 4 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 5 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 6 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 7 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 8 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-412 9 Billings MT   453F ONVOY, LLC - MT 650   2017-06-21   
406-413 A Billings MT BLNGMTMADS1  9636 QWEST CORPORATION 650      
406-413 0 Billings MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-04-09   
406-413 1 Billings MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-04-09   
406-413 2 Billings MT   9636 QWEST CORPORATION 650   2015-06-11   
406-413 3 Billings MT   9636 QWEST CORPORATION 650   2015-06-11   
406-413 4 Billings MT   9636 QWEST CORPORATION 650   2015-06-11   
406-413 5 Billings MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2016-11-18   
406-413 6 Billings MT   771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 650   2017-08-21   
406-413 7 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2022-08-13   
406-413 8 Billings MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-04-09   
406-413 9 Billings MT   588H AIRUS, INC. - MT 650   2017-04-06   
406-414 A Bozeman MT BZMNMTMADS0  9636 QWEST CORPORATION 650      
406-414 0 Bozeman MT   453F ONVOY, LLC - MT 650   2015-12-10   
406-414 1 Bozeman MT   9636 QWEST CORPORATION 650   2012-01-06   
406-414 2 Bozeman MT   9636 QWEST CORPORATION 650   2012-01-06   
406-414 3 Bozeman MT   9636 QWEST CORPORATION 650   2012-01-06   
406-414 4 Bozeman MT   9636 QWEST CORPORATION 650   2012-01-06   
406-414 5 Bozeman MT   9636 QWEST CORPORATION 650   2012-01-06   
406-414 6 Bozeman MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2012-03-31   
406-414 7 Bozeman MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2012-03-31   
406-414 8 Bozeman MT   9636 QWEST CORPORATION 650   2013-02-10   
406-414 9 Bozeman MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2016-08-19   
406-415 A Deer Lodge MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-415 0 Deer Lodge MT   453F ONVOY, LLC - MT 648   2021-07-05   
406-415 1 Deer Lodge MT   792K CHARTER IP ENABLED SERVICES, LLC 648   2010-06-07   
406-415 2 Deer Lodge MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2011-01-16   
406-415 3 Deer Lodge MT   453F ONVOY, LLC - MT 648   2012-12-17   
406-415 4 Deer Lodge MT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2015-03-15   
406-415 5 Deer Lodge MT   453F ONVOY, LLC - MT 648   2017-11-17   
406-415 6 Deer Lodge MT   508J CENTURYLINK COMMUNICATIONS, LLC 648   2014-05-24   
406-415 7 Deer Lodge MT   453F ONVOY, LLC - MT 648   2011-10-21   
406-415 8 Deer Lodge MT   453F ONVOY, LLC - MT 648   2019-10-28   
406-415 9 Deer Lodge MT   073H TELNYX LLC 648   2020-08-07   
406-416 A Forsyth MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-416 0 Forsyth MT   453F ONVOY, LLC - MT 650   2021-07-05   
406-416 1 Forsyth MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2021-12-23   
406-416 2 Forsyth MT   453F ONVOY, LLC - MT 650   2021-03-07   
406-416 3 Forsyth MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2023-06-01   

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Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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