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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
406-425 8 Red Lodge MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2025-01-19   
406-425 9 Red Lodge MT   145J TERRA NOVA TELECOM INC. 650   2022-08-03   
406-426 A Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-426 0 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-426 1 Red Lodge MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2008-11-26   
406-426 2 Red Lodge MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2011-08-11   
406-426 3 Red Lodge MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-06-05   
406-426 4 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-09-13   
406-426 5 Red Lodge MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-426 6 Red Lodge MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2024-09-13   
406-426 7 Red Lodge MT BLNGMTWE8MD  508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-12   
406-426 8 Red Lodge MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2011-04-21   
406-426 9 Red Lodge MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2016-08-21   
406-427 A South Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-428 A Grass Range MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-428 2 Grass Range MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-428 8 Grass Range MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-12-17   
406-429 A Winnett MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 0 Winnett MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 1 Winnett MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 2 Winnett MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 4 Winnett MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 5 Winnett MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 6 Winnett MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 7 Winnett MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 8 Winnett MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2026-06-15   
406-429 9 Winnett MT   2246 MID-RIVERS TEL. COOP., INC. 650      
406-430 A Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 0 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-05-17   
406-430 1 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-430 2 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-10-28   
406-430 3 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-11-18   
406-430 4 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-09-15   
406-430 5 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-11-18   
406-430 6 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-09-15   
406-430 7 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-11-18   
406-430 8 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-11-18   
406-430 9 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-11-30   
406-431 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-432 A Devon MT SNBRMTXCDS0  2248 NORTHERN TEL. COOP., INC. 648      
406-433 A Sidney MT SDNYMTAORS0  7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650      
406-434 A Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 1 Shelby MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2024-12-27   
406-434 2 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 3 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 4 Shelby MT   145J TERRA NOVA TELECOM INC. 648   2025-10-09   
406-434 5 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 6 Shelby MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2005-02-21   
406-434 7 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-434 8 Shelby MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2007-03-09   
406-434 9 Shelby MT SHLBMTMADS0  9636 QWEST CORPORATION 648      
406-435 A Billings MT   520K TDS METROCOM, LLC 650      
406-435 0 Billings MT   520K TDS METROCOM, LLC 650   2025-12-06   
406-435 1 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 2 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 3 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 4 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 5 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 6 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 7 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 8 Billings MT BLNGMT20PS0  4222 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 650      
406-435 9 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2021-04-22   
406-436 A Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-436 0 Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-436 2 Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-436 5 Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-436 8 Broadus MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2026-05-09   
406-436 9 Broadus MT BRDSMTXBRS2  2251 RANGE TEL COOP INC 650      
406-437 A Helena MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648      
406-437 0 Helena MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2023-09-28   
406-437 1 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-04-09   
406-437 2 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-07-06   
406-437 3 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-09-14   
406-437 4 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-04-04   
406-437 5 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648   2008-08-13   
406-437 6 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648   2008-08-13   
406-437 7 Helena MT HLNAMTMADS0  9636 QWEST CORPORATION 648   2008-08-13   
406-437 8 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-08   
406-437 9 Helena MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2004-09-19   
406-438 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-438 0 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2022-12-10   
406-438 1 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-438 2 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-438 3 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-11-23   
406-438 4 Helena MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2023-04-01   
406-438 5 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-07-14   
406-438 6 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-10-11   
406-438 7 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-02-06   
406-438 8 Helena MT GRFLMTMAHMD  073H TELNYX LLC 648   2023-12-09   
406-438 9 Helena MT GRFLMTMAHMD  073H TELNYX LLC 648   2023-12-09   
406-439 A Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 0 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 1 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 2 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 3 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 4 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 5 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 6 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 7 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 8 Helena MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      

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

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