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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
406-278 5 Conrad MT   9636 QWEST CORPORATION 648      
406-278 6 Conrad MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2006-07-10   
406-278 7 Conrad MT   9636 QWEST CORPORATION 648      
406-278 8 Conrad MT   453F ONVOY, LLC - MT 648   2010-08-30   
406-278 9 Conrad MT   9636 QWEST CORPORATION 648      
406-279 A Valier MT FRFDMTXCDS1  2255 3 RIVERS TEL. COOP., INC. 648      
406-280 A St Regis MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-280 0 St Regis MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-281 A Billings MT BLNGMTWEBMD  771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 650      
406-281 0 Billings MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2005-03-03   
406-281 1 Billings MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2005-06-20   
406-281 2 Billings MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2005-09-26   
406-281 3 Billings MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2006-03-20   
406-281 4 Billings MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2006-06-25   
406-281 5 Billings MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2009-03-27   
406-281 6 Billings MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2009-03-27   
406-281 7 Billings MT   453F ONVOY, LLC - MT 650   2008-03-22   
406-281 8 Billings MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2009-03-27   
406-281 9 Billings MT   771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 650      
406-282 A Manhattan MT AMSTMTMARS1  9636 QWEST CORPORATION 650      
406-282 0 Manhattan MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2004-11-13   
406-282 1 Manhattan MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2009-02-13   
406-282 2 Manhattan MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2020-06-05   
406-282 3 Manhattan MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2010-02-20   
406-282 4 Manhattan MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2011-06-19   
406-282 5 Manhattan MT   508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
406-282 6 Manhattan MT   9636 QWEST CORPORATION 650      
406-282 7 Manhattan MT   9636 QWEST CORPORATION 650      
406-282 8 Manhattan MT   453F ONVOY, LLC - MT 650   2017-05-29   
406-282 9 Manhattan MT   9636 QWEST CORPORATION 650      
406-283 A Libby MT LBBYMTXCDS0  4322 ZIPLY FIBER MONTANA, LLC DBA ZIPLY FIBER 960      
406-283 0 Libby MT   453F ONVOY, LLC - MT 960   2020-06-05   
406-283 1 Libby MT   6010 NEW CINGULAR WIRELESS PCS, LLC 960      
406-283 2 Libby MT   4322 ZIPLY FIBER MONTANA, LLC DBA ZIPLY FIBER 960      
406-283 3 Libby MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 960   2017-04-01   
406-283 4 Libby MT   453F ONVOY, LLC - MT 960   2020-02-23   
406-283 5 Libby MT   453F ONVOY, LLC - MT 960   2021-08-28   
406-283 6 Libby MT   4322 ZIPLY FIBER MONTANA, LLC DBA ZIPLY FIBER 960      
406-283 7 Libby MT   4322 ZIPLY FIBER MONTANA, LLC DBA ZIPLY FIBER 960      
406-283 8 Libby MT   453F ONVOY, LLC - MT 960   2022-01-02   
406-283 9 Libby MT   771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 960   2020-07-13   
406-284 A Manhattan MT MNHTMTMARS1  9636 QWEST CORPORATION 650      
406-284 0 Manhattan MT   453F ONVOY, LLC - MT 650   2020-07-26   
406-284 1 Manhattan MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2014-03-31   
406-284 2 Manhattan MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2005-06-17   
406-284 3 Manhattan MT   9636 QWEST CORPORATION 650      
406-284 4 Manhattan MT   9636 QWEST CORPORATION 650      
406-284 5 Manhattan MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-06-05   
406-284 6 Manhattan MT   9636 QWEST CORPORATION 650      
406-284 7 Manhattan MT   453F ONVOY, LLC - MT 650   2007-03-19   
406-284 8 Manhattan MT   453F ONVOY, LLC - MT 650   2011-10-24   
406-284 9 Manhattan MT   9636 QWEST CORPORATION 650      
406-285 A Three Forks MT THFKMTMARS1  9636 QWEST CORPORATION 650      
406-285 0 Three Forks MT   9636 QWEST CORPORATION 650      
406-285 1 Three Forks MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2009-02-13   
406-285 2 Three Forks MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2004-11-13   
406-285 3 Three Forks MT   9636 QWEST CORPORATION 650      
406-285 4 Three Forks MT   9636 QWEST CORPORATION 650      
406-285 5 Three Forks MT   9636 QWEST CORPORATION 650      
406-285 6 Three Forks MT   9636 QWEST CORPORATION 650      
406-285 7 Three Forks MT   453F ONVOY, LLC - MT 650   2007-03-19   
406-285 8 Three Forks MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2011-06-27   
406-285 9 Three Forks MT   9636 QWEST CORPORATION 650      
406-286 A Reserve MT RSRVMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-286 5 Reserve MT   2247 NEMONT TEL COOP INC 650      
406-286 7 Reserve MT   443B SAGEBRUSH CELLULAR, INC. 650      
406-287 A Whitehall MT WHTHMTMARS1  9636 QWEST CORPORATION 648      
406-287 0 Whitehall MT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2017-08-07   
406-287 1 Whitehall MT   453F ONVOY, LLC - MT 648   2021-07-08   
406-287 2 Whitehall MT   9636 QWEST CORPORATION 648      
406-287 3 Whitehall MT   9636 QWEST CORPORATION 648      
406-287 4 Whitehall MT   624H ONVOY SPECTRUM, LLC 648   2025-02-03   
406-287 5 Whitehall MT   9636 QWEST CORPORATION 648      
406-287 6 Whitehall MT   453F ONVOY, LLC - MT 648   2011-10-24   
406-287 7 Whitehall MT   9636 QWEST CORPORATION 648      
406-287 8 Whitehall MT   453F ONVOY, LLC - MT 648   2007-03-19   
406-287 9 Whitehall MT   9636 QWEST CORPORATION 648      
406-288 A Drummond MT ALTNMTXBRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-289 A Conrad MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-289 0 Conrad MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-289 1 Conrad MT   453F ONVOY, LLC - MT 648   2023-08-20   
406-289 3 Conrad MT   453F ONVOY, LLC - MT 648   2022-12-09   
406-289 4 Conrad MT   453F ONVOY, LLC - MT 648   2020-11-08   
406-289 6 Conrad MT   624H ONVOY SPECTRUM, LLC 648   2021-11-14   
406-289 8 Conrad MT   453F ONVOY, LLC - MT 648   2012-12-17   
406-289 9 Conrad MT   453F ONVOY, LLC - MT 648   2012-12-17   
406-290 A Columbus MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-290 0 Columbus MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2007-12-17   
406-290 1 Columbus MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2008-01-28   
406-290 2 Columbus MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2008-02-04   
406-290 3 Columbus MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-05-31   
406-290 4 Columbus MT   6010 NEW CINGULAR WIRELESS PCS, LLC 650   2010-11-05   
406-290 5 Columbus MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2011-03-27   
406-290 6 Columbus MT   073H TELNYX LLC 650   2020-09-27   
406-290 7 Columbus MT   453F ONVOY, LLC - MT 650   2007-05-06   
406-290 8 Columbus MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2018-06-07   
406-290 9 Columbus MT   994E BANDWIDTH.COM CLEC, LLC - MT 650   2008-11-26   
406-291 A Libby MT CRALIDXXGMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960      
406-291 0 Libby MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960      
406-291 1 Libby MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960      

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

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