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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
406-560 8 Anaconda MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-560 9 Anaconda MT   145J TERRA NOVA TELECOM INC. 648   2026-06-05   
406-561 A Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650      
406-561 0 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2020-02-02   
406-561 1 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2020-02-02   
406-561 2 Billings MT BLNGMTMAXMD  5562 METROPCS, INC. 650   2018-08-04   
406-561 3 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2019-04-28   
406-561 4 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2019-04-28   
406-561 5 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2018-11-25   
406-561 6 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2018-05-10   
406-561 7 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2018-05-10   
406-561 8 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2018-03-22   
406-561 9 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2017-11-01   
406-562 A Augusta MT FRFDMTXCDS1  2255 3 RIVERS TEL. COOP., INC. 648      
406-563 A Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-563 0 Anaconda MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2006-04-09   
406-563 2 Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-563 3 Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-563 4 Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-563 5 Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-563 6 Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-563 7 Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-563 8 Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-563 9 Anaconda MT ANCNMTMARS1  9636 QWEST CORPORATION 648      
406-564 A Great Falls MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-564 0 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-09-23   
406-564 1 Great Falls MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2005-06-03   
406-564 2 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-10-22   
406-564 3 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-02-06   
406-564 4 Great Falls MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-564 5 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-03-07   
406-564 6 Great Falls MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2010-11-06   
406-564 7 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-04-04   
406-564 8 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-06-03   
406-564 9 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-05   
406-565 A Butte MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-565 0 Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2008-09-15   
406-565 1 Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-02-23   
406-565 2 Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-09-14   
406-565 3 Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-02-09   
406-565 4 Butte MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-565 5 Butte MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2005-05-13   
406-565 6 Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-07-14   
406-565 7 Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-02-05   
406-565 8 Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-05-05   
406-565 9 Butte MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2004-09-27   
406-566 A Stanford MT FTBNMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-566 1 Stanford MT   3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-566 2 Stanford MT   3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-566 3 Stanford MT   3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-566 4 Stanford MT   3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-566 5 Stanford MT   3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-566 7 Stanford MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2026-06-09   
406-566 8 Stanford MT   3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-566 9 Stanford MT   3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-567 A Denton MT FTBNMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 648      
406-568 A Ryegate MT WGLNMTXCDS2  2246 MID-RIVERS TEL. COOP., INC. 650      
406-568 0 Ryegate MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-568 1 Ryegate MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-568 2 Ryegate MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-568 4 Ryegate MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2026-06-16   
406-568 5 Ryegate MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-568 9 Ryegate MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-569 A West Homesteaders Gap MT KEENNDXADS0  1632 RESERVATION TEL. COOP. 638      
406-570 A Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-571 A Finley Point MT KLSLMTAZ1MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-571 1 Finley Point MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-17   
406-571 2 Finley Point MT KLSLMTAZ1MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2006-04-21   
406-571 3 Finley Point MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2016-02-26   
406-571 4 Finley Point MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2016-02-26   
406-571 5 Finley Point MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   
406-571 6 Finley Point MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-11-08   
406-571 7 Finley Point MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2007-04-14   
406-571 8 Finley Point MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2011-07-11   
406-571 9 Finley Point MT GRFLMTMAHMD  073H TELNYX LLC 648   2020-08-09   
406-572 A Martinsdale MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-573 A Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-573 0 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648   2021-02-08   
406-573 1 Browning MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2015-06-30   
406-573 6 Browning MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2021-11-14   
406-573 8 Browning MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2021-07-18   
406-574 A Silvertip MT POWLWYMARS1  9636 QWEST CORPORATION 654      
406-574 0 Silvertip MT CHYNWYRF1MD  073H TELNYX LLC 654   2018-07-25   
406-574 1 Silvertip MT POWLWYMARS1  9636 QWEST CORPORATION 654      
406-574 2 Silvertip MT CHYNWYMAX2X  453F ONVOY, LLC - MT 654   2021-07-05   
406-574 3 Silvertip MT POWLWYMARS1  9636 QWEST CORPORATION 654      
406-574 4 Silvertip MT CHYNWYMAEMD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 654   2023-03-02   
406-574 5 Silvertip MT CHYNWYMAXKX  478J NUSO, LLC 654   2023-12-09   
406-574 6 Silvertip MT CHYNWYMAXKX  478J NUSO, LLC 654   2023-12-09   
406-574 7 Silvertip MT CHYNWYMAXAX  508J CENTURYLINK COMMUNICATIONS, LLC 654   2015-03-18   
406-574 8 Silvertip MT CHYNWYMAXKX  478J NUSO, LLC 654   2020-10-11   
406-575 A North Ryegate MT WGLNMTXCDS2  2246 MID-RIVERS TEL. COOP., INC. 650      
406-576 A Conrad MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-576 1 Conrad MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2017-08-15   
406-576 9 Conrad MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2024-12-23   
406-577 A Bozeman MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-577 0 Bozeman MT BLNGMT93DS0  588H AIRUS, INC. - MT 650   2018-02-26   
406-577 1 Bozeman MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-577 2 Bozeman MT BZMNMTEF2MD  792K CHARTER IP ENABLED SERVICES, LLC 650   2011-07-28   
406-577 3 Bozeman MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2015-08-13   

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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