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
406-695 2 Frazer MT FRZRMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-695 7 Frazer MT GLSGMTXC1MD  443B SAGEBRUSH CELLULAR, INC. 650      
406-696 A Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-697 A Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-698 A Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-699 A Hardin MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-699 0 Hardin MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-699 1 Hardin MT   145J TERRA NOVA TELECOM INC. 650   2022-05-05   
406-699 4 Hardin MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2024-05-10   
406-699 7 Hardin MT   145J TERRA NOVA TELECOM INC. 650   2025-02-14   
406-699 9 Hardin MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2024-08-23   
406-702 A Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650      
406-702 0 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-09-13   
406-702 1 Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2012-05-06   
406-702 2 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-09-21   
406-702 3 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-09-21   
406-702 4 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-09-21   
406-702 5 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-09-21   
406-702 6 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-10-15   
406-702 7 Billings MT BLNGMT93HMD  792K CHARTER IP ENABLED SERVICES, LLC 650   2013-12-06   
406-702 8 Billings MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2022-11-17   
406-702 9 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-10-30   
406-703 A Columbus MT BLNGMTWE0MD  073H TELNYX LLC 650      
406-703 0 Columbus MT BLNGMTWE0MD  073H TELNYX LLC 650   2021-07-16   
406-703 1 Columbus MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2021-09-06   
406-703 2 Columbus MT BLNGMTWEDMD  624H ONVOY SPECTRUM, LLC 650   2024-03-22   
406-703 3 Columbus MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-08-28   
406-703 6 Columbus MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2025-02-05   
406-703 7 Columbus MT   588H AIRUS, INC. - MT 650   2025-05-15   
406-703 8 Columbus MT BLNGMT934MD  939H COMMIO, LLC 650   2021-11-14   
406-703 9 Columbus MT BLNGMT934MD  939H COMMIO, LLC 650   2021-11-14   
406-707 A Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-707 0 Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2015-03-19   
406-707 6 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-11-08   
406-707 7 Lewistown MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2024-12-27   
406-708 A Lewistown MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-708 2 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-02-11   
406-708 3 Lewistown MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2016-09-27   
406-708 4 Lewistown MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2005-04-09   
406-708 5 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-02-11   
406-708 6 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2006-10-19   
406-708 7 Lewistown MT HLNAMTMAUMD  508J CENTURYLINK COMMUNICATIONS, LLC 648   2014-05-24   
406-708 8 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-10-28   
406-709 A Lakeside MT KLSLMTAZ1MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-709 0 Lakeside MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-03-07   
406-709 2 Lakeside MT KLSLMTAZ1MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-709 3 Lakeside MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-14   
406-709 4 Lakeside MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-14   
406-709 5 Lakeside MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-12-14   
406-709 6 Lakeside MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-09-15   
406-709 7 Lakeside MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2007-11-17   
406-709 8 Lakeside MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2011-05-14   
406-709 9 Lakeside MT GRFLMTMAHMD  073H TELNYX LLC 648   2020-08-13   
406-715 A Lame Deer MT BLNGMTASIMD  682H COMMNET WIRELESS SUBCO, LLC 650      
406-717 A Billings MT BLNGMT937MD  197D VONAGE AMERICA LLC 650      
406-717 0 Billings MT BLNGMT937MD  197D VONAGE AMERICA LLC 650   2018-07-30   
406-717 1 Billings MT BLNGMTWEDMD  624H ONVOY SPECTRUM, LLC 650   2022-11-12   
406-717 2 Billings MT BLNGMTWEDMD  624H ONVOY SPECTRUM, LLC 650   2022-11-12   
406-717 3 Billings MT BLNGMTWEDMD  624H ONVOY SPECTRUM, LLC 650   2022-11-12   
406-717 4 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2022-01-14   
406-717 5 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2022-01-14   
406-717 6 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-04-04   
406-717 7 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-04-04   
406-717 8 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-03-12   
406-717 9 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2021-03-12   
406-718 A Darby MT GRFLMTMAPMD  506J TWILIO INTERNATIONAL, INC. 648      
406-718 1 Darby MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2024-09-08   
406-718 4 Darby MT GRFLMTMAPMD  506J TWILIO INTERNATIONAL, INC. 648   2022-08-28   
406-718 7 Darby MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-06-11   
406-718 8 Darby MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-06-11   
406-719 A Fromberg MT BLNGMTASMMD  506J TWILIO INTERNATIONAL, INC. 650      
406-719 0 Fromberg MT BLNGMT933MD  073H TELNYX LLC 650   2019-10-21   
406-719 1 Fromberg MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-01-05   
406-719 2 Fromberg MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-11-10   
406-719 3 Fromberg MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-02-11   
406-719 4 Fromberg MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-10-20   
406-719 5 Fromberg MT BLNGMTASMMD  506J TWILIO INTERNATIONAL, INC. 650   2022-08-28   
406-719 6 Fromberg MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-10-20   
406-719 7 Fromberg MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-01-05   
406-719 8 Fromberg MT BLNGMT93BMD  321J HD CARRIER LLC 650   2020-09-27   
406-719 9 Fromberg MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-02-11   
406-720 A Colstrip MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-720 0 Colstrip MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-720 1 Colstrip MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-07-05   
406-720 2 Colstrip MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-720 3 Colstrip MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-09-10   
406-720 4 Colstrip MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-720 5 Colstrip MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-720 6 Colstrip MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-720 7 Colstrip MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-720 8 Colstrip MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-720 9 Colstrip MT BLNGMT933MD  073H TELNYX LLC 650   2018-07-25   
406-721 A Missoula MT MSSLMTMADS0  9636 QWEST CORPORATION 648      
406-722 A Alberton MT ALTNMTXBRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-722 0 Alberton MT   2235 BLACKFOOT TEL. COOP., INC. 648      
406-722 1 Alberton MT   2235 BLACKFOOT TEL. COOP., INC. 648      
406-722 2 Alberton MT   2235 BLACKFOOT TEL. COOP., INC. 648      
406-722 3 Alberton MT   2235 BLACKFOOT TEL. COOP., INC. 648      
406-722 4 Alberton MT   2235 BLACKFOOT TEL. COOP., INC. 648      
406-722 6 Alberton MT   2235 BLACKFOOT TEL. COOP., INC. 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: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.