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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
406-964 1 Great Falls MT VGHNMTMARS1  9636 QWEST CORPORATION 648      
406-964 2 Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2021-10-30   
406-964 3 Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2021-10-30   
406-964 4 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-10-05   
406-964 5 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-10-05   
406-964 6 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-10-05   
406-964 7 Great Falls MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2024-11-10   
406-964 8 Great Falls MT VGHNMTMARS1  9636 QWEST CORPORATION 648      
406-964 9 Great Falls MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2023-12-23   
406-965 A Great Falls MT GRFLMTMADS3  588H AIRUS, INC. - MT 648      
406-965 1 Great Falls MT GRFLMTMADS3  588H AIRUS, INC. - MT 648   2023-11-26   
406-965 2 Great Falls MT VGHNMTMARS1  9636 QWEST CORPORATION 648      
406-965 3 Great Falls MT VGHNMTMARS1  9636 QWEST CORPORATION 648      
406-966 A Shelby MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-966 0 Shelby MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-966 1 Shelby MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-17   
406-966 2 Shelby MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-17   
406-966 3 Shelby MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2014-03-14   
406-966 4 Shelby MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-966 5 Shelby MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-03-07   
406-966 6 Shelby MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-03-07   
406-966 7 Shelby MT HLNAMTMAUMD  508J CENTURYLINK COMMUNICATIONS, LLC 648   2014-05-24   
406-967 A Worden MT WRDNMTXCDS0  2250 PROJECT TEL. CO., INC. 650      
406-967 0 Worden MT   2250 PROJECT TEL. CO., INC. 650      
406-967 1 Worden MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2025-05-06   
406-967 2 Worden MT   2250 PROJECT TEL. CO., INC. 650      
406-967 3 Worden MT   2250 PROJECT TEL. CO., INC. 650      
406-967 4 Worden MT   2250 PROJECT TEL. CO., INC. 650      
406-967 5 Worden MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2025-04-07   
406-967 6 Worden MT   2250 PROJECT TEL. CO., INC. 650      
406-967 7 Worden MT   2250 PROJECT TEL. CO., INC. 650      
406-967 8 Worden MT   2250 PROJECT TEL. CO., INC. 650      
406-967 9 Worden MT   2250 PROJECT TEL. CO., INC. 650      
406-968 A Lewistown MT   321J HD CARRIER LLC 648      
406-968 0 Lewistown MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-968 4 Lewistown MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-968 6 Lewistown MT MSSLMTMAYMD  771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 648   2019-05-03   
406-968 7 Lewistown MT   321J HD CARRIER LLC 648   2025-07-15   
406-968 8 Lewistown MT   321J HD CARRIER LLC 648   2025-07-15   
406-968 9 Lewistown MT   321J HD CARRIER LLC 648   2025-07-15   
406-969 A Billings MT BLNGMTASPMD  622J SKYE TELECOM LLC DBA SKYETEL 650      
406-969 0 Billings MT BLNGMTASPMD  622J SKYE TELECOM LLC DBA SKYETEL 650   2021-07-16   
406-969 1 Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2011-03-06   
406-969 2 Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2011-07-21   
406-969 3 Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2011-10-13   
406-969 4 Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2012-01-26   
406-969 5 Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2012-01-26   
406-969 6 Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2012-05-03   
406-969 7 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2024-03-23   
406-969 8 Billings MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2020-12-01   
406-969 9 Billings MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2020-12-01   
406-970 A Billings MT BLNGMTWE8MD  508J CENTURYLINK COMMUNICATIONS, LLC 650      
406-970 0 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2019-04-26   
406-970 1 Billings MT BLNGMTWECMD  551G NUSO, LLC 650   2017-10-17   
406-970 2 Billings MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2022-10-22   
406-970 3 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2020-05-13   
406-970 4 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-08-22   
406-970 5 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-08-22   
406-970 6 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-08-22   
406-970 7 Billings MT BLNGMTWE8MD  508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-01   
406-970 8 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-06-11   
406-970 9 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-06-11   
406-971 A Plevna MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-971 0 Plevna MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-971 8 Plevna MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-971 9 Plevna MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-972 A West Camp Crook MT BISNSDXADS0  1689 WEST RIVER COOPERATIVE TELEPHONE COMPANY 640      
406-973 A Sidney MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-973 0 Sidney MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-973 2 Sidney MT   145J TERRA NOVA TELECOM INC. 650   2021-09-28   
406-973 9 Sidney MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 A Circle MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 0 Circle MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 2 Circle MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 3 Circle MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 6 Circle MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2019-10-10   
406-974 9 Circle MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-975 A Ekalaka MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-975 0 Ekalaka MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-975 6 Ekalaka MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-977 A Jordan MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-977 0 Jordan MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-977 2 Jordan MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-977 7 Jordan MT   145J TERRA NOVA TELECOM INC. 650   2025-06-07   
406-977 8 Jordan MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-977 9 Jordan MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-978 A Baker MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-978 2 Baker MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-978 3 Baker MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-979 A Richey MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-979 0 Richey MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-979 5 Richey MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-979 8 Richey MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-979 9 Richey MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-980 A Townsend MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-980 0 Townsend MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-980 1 Townsend MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-980 5 Townsend MT HLNAMTMAZMD  624H ONVOY SPECTRUM, LLC 648   2025-01-02   
406-980 6 Townsend MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-03-07   
406-980 7 Townsend MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2023-02-27   

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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