Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-623 9 Hardin MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2008-11-26   
406-624 A Bozeman MT BZMNMTHZDS0  746D MONTANA OPTICOM, LLC - MT 650      
406-624 0 Bozeman MT BZMNMTHZDS0  746D MONTANA OPTICOM, LLC - MT 650   2004-05-03   
406-624 1 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2023-12-28   
406-624 2 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2020-11-13   
406-624 3 Bozeman MT BLNGMTWEAMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2007-05-16   
406-624 4 Bozeman MT BLNGMTWEAMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2019-02-25   
406-624 5 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2020-11-13   
406-624 6 Bozeman MT BZMNMTEF2MD  792K CHARTER IP ENABLED SERVICES, LLC 650   2005-06-12   
406-624 7 Bozeman MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2020-02-14   
406-624 8 Bozeman MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2019-11-20   
406-624 9 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2009-02-13   
406-625 A Stevensville MT MSSLMTMAX0X  7421 AT&T - LOCAL 648   2024-02-23   
406-625 0 Stevensville MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-17   
406-625 1 Stevensville MT GRFLMTMAHMD  073H TELNYX LLC 648   2020-08-13   
406-625 2 Stevensville MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2005-10-21   
406-625 3 Stevensville MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2011-01-16   
406-625 4 Stevensville MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-09-15   
406-625 5 Stevensville MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-11-08   
406-625 6 Stevensville MT HLNAMTMAUMD  508J CENTURYLINK COMMUNICATIONS, LLC 648   2014-05-24   
406-625 7 Stevensville MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2006-10-19   
406-625 8 Stevensville MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2011-10-24   
406-625 9 Stevensville MT MSSLMTMAX0X  7421 AT&T - LOCAL 648   2024-02-24   
406-626 A Frenchtown MT FCTWMTMARS1  9636 QWEST CORPORATION 648      
406-626 0 Frenchtown MT FCTWMTMARS1  9636 QWEST CORPORATION 648      
406-626 1 Frenchtown MT FCTWMTMARS1  9636 QWEST CORPORATION 648      
406-626 2 Frenchtown MT FCTWMTMARS1  9636 QWEST CORPORATION 648      
406-626 3 Frenchtown MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2006-11-08   
406-626 4 Frenchtown MT FCTWMTMARS1  9636 QWEST CORPORATION 648      
406-626 5 Frenchtown MT FCTWMTMARS1  9636 QWEST CORPORATION 648      
406-626 6 Frenchtown MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2024-10-14   
406-626 7 Frenchtown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2007-03-19   
406-626 8 Frenchtown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2011-10-29   
406-626 9 Frenchtown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2023-08-20   
406-627 A East Conrad MT FRFDMTXCDS1  2255 3 RIVERS TEL. COOP., INC. 648      
406-628 A Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 0 Laurel MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2004-11-13   
406-628 1 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 2 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 3 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 4 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 5 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 6 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 7 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 8 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-628 9 Laurel MT LARLMTMARS1  9636 QWEST CORPORATION 650      
406-629 A Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-629 0 Hardin MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-629 1 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-629 2 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-629 3 Hardin MT BLNGMTWEAMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2010-10-01   
406-629 4 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-629 5 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-629 6 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2023-04-18   
406-629 7 Hardin MT BLNGMTWEDMD  624H ONVOY SPECTRUM, LLC 650   2024-03-22   
406-629 8 Hardin MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2023-11-22   
406-629 9 Hardin MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2025-05-16   
406-630 A Sidney MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-630 0 Sidney MT BLNGMT933MD  073H TELNYX LLC 650   2017-03-31   
406-630 1 Sidney MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2016-09-10   
406-630 2 Sidney MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2013-04-30   
406-630 3 Sidney MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2021-12-04   
406-630 4 Sidney MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2005-04-09   
406-630 5 Sidney MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2006-10-20   
406-630 6 Sidney MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-630 7 Sidney MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2011-10-24   
406-630 8 Sidney MT BLNGMT93DS0  588H AIRUS, INC. - MT 650   2018-03-02   
406-630 9 Sidney MT BLNGMT93DS0  588H AIRUS, INC. - MT 650   2020-03-27   
406-631 A Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-631 0 Elmo MT GRFLMTMAHMD  073H TELNYX LLC 648   2020-08-09   
406-631 1 Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-10   
406-631 2 Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-10   
406-631 3 Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-10   
406-631 4 Elmo MT CHRLMT010MD  986F WESTERN MONTANA COMMUNITYTEL INC. - MT 648   2013-07-20   
406-631 5 Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-03-07   
406-631 6 Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-11-08   
406-631 7 Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2007-09-21   
406-631 8 Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2011-04-06   
406-631 9 Elmo MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-03-07   
406-632 A Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-632 1 Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-632 2 Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-632 3 Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-632 4 Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-632 5 Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-632 6 Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-632 7 Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-632 8 Harlowton MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2019-01-11   
406-632 9 Harlowton MT WSSPMTXCDS0  3310 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-633 A Laurel MT PRCYMTMARS1  9636 QWEST CORPORATION 650      
406-633 0 Laurel MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2009-05-22   
406-633 1 Laurel MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2009-11-13   
406-633 2 Laurel MT PRCYMTMARS1  9636 QWEST CORPORATION 650      
406-633 3 Laurel MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2010-06-21   
406-633 4 Laurel MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2011-03-27   
406-633 5 Laurel MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2011-06-03   
406-633 7 Laurel MT BLNGMTMATMD  935G TRI TEL, INC. - MT 650   2013-01-28   
406-633 8 Laurel MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2024-12-05   
406-633 9 Laurel MT PRCYMTMARS1  9636 QWEST CORPORATION 650      
406-634 A Helena MT   453F ONVOY, LLC - MT 648      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.