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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
406-930 6 Big Timber MT   145J TERRA NOVA TELECOM INC. 650   2025-06-07   
406-930 9 Big Timber MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2024-06-14   
406-931 A Big Timber MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-931 0 Big Timber MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-931 1 Big Timber MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2019-01-11   
406-931 9 Big Timber MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2025-11-13   
406-932 A Big Timber MT BGTMMTXCDS0  2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-932 0 Big Timber MT   2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-932 2 Big Timber MT   2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-932 3 Big Timber MT   2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-932 4 Big Timber MT   2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-932 5 Big Timber MT   2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-932 6 Big Timber MT   2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-932 7 Big Timber MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2017-05-20   
406-932 8 Big Timber MT   2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-933 A Helena MT CLNCMTMARS1  9636 QWEST CORPORATION 648      
406-933 3 Helena MT   145J TERRA NOVA TELECOM INC. 648   2025-10-06   
406-933 5 Helena MT   9636 QWEST CORPORATION 648      
406-933 8 Helena MT   9636 QWEST CORPORATION 648      
406-933 9 Helena MT   9636 QWEST CORPORATION 648      
406-934 A Miles City MT   743G WIDE VOICE, LLC - MT 650      
406-934 0 Miles City MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-934 1 Miles City MT   743G WIDE VOICE, LLC - MT 650   2025-07-22   
406-934 8 Miles City MT   624H ONVOY SPECTRUM, LLC 650   2025-01-16   
406-934 9 Miles City MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-935 A Broadus MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-935 0 Broadus MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-935 2 Broadus MT   145J TERRA NOVA TELECOM INC. 650   2025-06-07   
406-935 3 Broadus MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-12-17   
406-935 5 Broadus MT   145J TERRA NOVA TELECOM INC. 650   2026-01-04   
406-935 9 Broadus MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-936 A Clyde Park MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650      
406-936 0 Clyde Park MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-09-14   
406-936 1 Clyde Park MT   073H TELNYX LLC 650   2018-07-25   
406-936 2 Clyde Park MT   453F ONVOY, LLC - MT 650   2021-03-07   
406-936 3 Clyde Park MT   453F ONVOY, LLC - MT 650   2019-09-15   
406-936 4 Clyde Park MT   453F ONVOY, LLC - MT 650   2019-10-28   
406-936 5 Clyde Park MT   453F ONVOY, LLC - MT 650   2021-03-07   
406-936 6 Clyde Park MT   453F ONVOY, LLC - MT 650   2020-01-05   
406-936 7 Clyde Park MT   6529 T-MOBILE USA, INC. 650   2024-03-15   
406-936 8 Clyde Park MT   453F ONVOY, LLC - MT 650   2021-07-05   
406-936 9 Clyde Park MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2022-02-12   
406-937 A Sunburst MT SNBRMTXCDS0  2248 NORTHERN TEL. COOP., INC. 648      
406-938 A Alzada MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-938 0 Alzada MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-938 3 Alzada MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-12-17   
406-938 4 Alzada MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-938 7 Alzada MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2021-08-27   
406-938 8 Alzada MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-938 9 Alzada MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-939 A West Glendive MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-939 0 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-939 1 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-939 2 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-939 3 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-939 4 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-939 5 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-939 8 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-11-28   
406-939 9 West Glendive MT   145J TERRA NOVA TELECOM INC. 650   2026-01-04   
406-940 A Molt MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-940 0 Molt MT   145J TERRA NOVA TELECOM INC. 650   2025-08-29   
406-940 5 Molt MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2017-09-02   
406-940 9 Molt MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2024-12-03   
406-941 A West Glendive MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-941 0 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-941 1 West Glendive MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2010-11-06   
406-941 2 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2011-02-06   
406-941 3 West Glendive MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-07-08   
406-942 A Glasgow MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-942 0 Glasgow MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2009-12-07   
406-942 1 Glasgow MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2023-04-11   
406-942 2 Glasgow MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2013-04-30   
406-943 A Sidney MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-943 0 Sidney MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-943 1 Sidney MT   453F ONVOY, LLC - MT 650   2021-03-07   
406-943 2 Sidney MT   453F ONVOY, LLC - MT 650   2021-03-07   
406-943 3 Sidney MT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2016-11-28   
406-943 4 Sidney MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-943 5 Sidney MT   771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 650   2015-02-25   
406-943 6 Sidney MT   453F ONVOY, LLC - MT 650   2020-11-10   
406-943 7 Sidney MT   508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-12   
406-943 8 Sidney MT   453F ONVOY, LLC - MT 650   2021-07-05   
406-943 9 Sidney MT   453F ONVOY, LLC - MT 650   2021-07-05   
406-944 A Miles City MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-944 0 Miles City MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-944 1 Miles City MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2012-10-20   
406-944 2 Miles City MT   453F ONVOY, LLC - MT 650   2012-12-17   
406-944 3 Miles City MT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2010-10-01   
406-944 4 Miles City MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-944 5 Miles City MT   453F ONVOY, LLC - MT 650   2012-12-17   
406-944 6 Miles City MT   771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 650   2019-04-12   
406-944 7 Miles City MT   453F ONVOY, LLC - MT 650   2019-09-15   
406-944 8 Miles City MT   588H AIRUS, INC. - MT 650   2019-11-01   
406-944 9 Miles City MT   588H AIRUS, INC. - MT 650   2020-03-01   
406-945 A Havre MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-945 0 Havre MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-945 1 Havre MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-945 2 Havre MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-945 3 Havre MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-945 4 Havre MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      

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

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