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
406-271 A Conrad MT CNRDMTAGDS0  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 0 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 1 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 2 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 3 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 4 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 5 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 6 Conrad MT   453F ONVOY, LLC - MT 648   2021-07-05   
406-271 7 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 8 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-271 9 Conrad MT   3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-272 A Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-272 0 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2010-06-17   
406-272 1 Billings MT   453F ONVOY, LLC - MT 650      
406-272 2 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2011-06-19   
406-272 3 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2011-06-19   
406-272 4 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2011-09-18   
406-272 5 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2010-10-21   
406-272 6 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2012-09-09   
406-272 7 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2012-09-09   
406-272 8 Billings MT   453F ONVOY, LLC - MT 650   2011-09-16   
406-272 9 Billings MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2012-09-09   
406-273 A Missoula MT LOLOMTMARS1  9636 QWEST CORPORATION 648      
406-273 0 Missoula MT   9636 QWEST CORPORATION 648      
406-273 1 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-08   
406-273 2 Missoula MT   9636 QWEST CORPORATION 648      
406-273 3 Missoula MT   9636 QWEST CORPORATION 648      
406-273 4 Missoula MT   9636 QWEST CORPORATION 648      
406-273 5 Missoula MT   9636 QWEST CORPORATION 648      
406-273 6 Missoula MT   9636 QWEST CORPORATION 648      
406-273 7 Missoula MT   9636 QWEST CORPORATION 648      
406-273 8 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-08-04   
406-273 9 Missoula MT   9636 QWEST CORPORATION 648      
406-274 A Missoula MT   771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 648      
406-274 0 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2008-02-14   
406-274 1 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-06-03   
406-274 2 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2008-08-18   
406-274 3 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2008-09-02   
406-274 4 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2008-10-29   
406-274 5 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-05   
406-274 6 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2008-10-29   
406-274 7 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2008-10-29   
406-274 8 Missoula MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-04-04   
406-274 9 Missoula MT   771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 648      
406-275 A Pablo MT FHIRMT01RS0  2252 RONAN TEL. CO. 648      
406-276 A Lima MT FRFDMTXCDS1  2255 3 RIVERS TEL. COOP., INC. 648      
406-276 0 Lima MT   2255 3 RIVERS TEL. COOP., INC. 648      
406-276 1 Lima MT   2255 3 RIVERS TEL. COOP., INC. 648      
406-276 2 Lima MT   2255 3 RIVERS TEL. COOP., INC. 648      
406-276 3 Lima MT   2255 3 RIVERS TEL. COOP., INC. 648      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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