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
406-970 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 5 Plevna MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2026-01-04   
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 1 Sidney MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2026-01-04   
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 4 Circle MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2026-01-04   
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      
406-975 8 Ekalaka MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2026-01-04   
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 6 Jordan MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2026-01-04   
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      
406-978 9 Baker MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2026-01-04   
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 GRFLMTMAKMD  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   
406-980 8 Townsend MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-11-08   
406-981 A South Miles City MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-981 0 South Miles City MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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