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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-399 7 South Havre MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-04-04   
406-399 8 South Havre MT HAVRMTXCDS1  958H TRIANGLE COMMUNICATION SYSTEM, INC. - MT- 648   2017-07-01   
406-400 A Havre MT HAVRMTXCDS1  958H TRIANGLE COMMUNICATION SYSTEM, INC. - MT- 648      
406-400 0 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-07-31   
406-400 1 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-07-31   
406-400 2 Havre MT HAVRMTXCDS1  958H TRIANGLE COMMUNICATION SYSTEM, INC. - MT- 648   2017-06-18   
406-400 3 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-07-31   
406-400 4 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-07-31   
406-400 5 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-07-31   
406-400 6 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-07-31   
406-400 7 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-07-31   
406-400 8 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-07-31   
406-400 9 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2017-09-18   
406-401 A Great Falls MT GRFLMTMAX0X  425J CSC WIRELESS, LLC 648      
406-401 0 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-02-04   
406-401 1 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-02-04   
406-401 2 Great Falls MT GRFLMTMAX0X  425J CSC WIRELESS, LLC 648   2019-07-20   
406-401 3 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-02-04   
406-401 4 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-02-04   
406-401 5 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2020-12-23   
406-401 6 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   
406-401 7 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   
406-401 8 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   
406-401 9 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   
406-402 A Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648      
406-402 0 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2022-04-02   
406-402 2 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2021-07-07   
406-402 3 Great Falls MT GRFLMTMAGMD  5562 METROPCS, INC. 648   2018-06-24   
406-402 4 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2022-09-29   
406-402 5 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2021-04-15   
406-402 6 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2020-02-06   
406-402 7 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2019-04-12   
406-402 8 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2018-10-08   
406-402 9 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648   2017-11-15   
406-403 A Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-403 0 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2006-05-08   
406-403 1 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-04-09   
406-403 2 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-07-06   
406-403 3 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-09-14   
406-403 4 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-403 5 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-403 6 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-11-23   
406-403 7 Great Falls MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2009-03-22   
406-403 8 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-11-23   
406-403 9 Great Falls MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-04-05   
406-404 A Bozeman MT   792K CHARTER IP ENABLED SERVICES, LLC 650      
406-404 0 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2014-10-04   
406-404 1 Bozeman MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2012-06-01   
406-404 2 Bozeman MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-404 3 Bozeman MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-404 4 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2013-05-10   
406-404 5 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2014-08-05   
406-404 6 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-05-14   
406-404 7 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-05-14   
406-404 8 Bozeman MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-05-14   
406-404 9 Bozeman MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2014-10-22   
406-405 A Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960      
406-405 0 Libby MT CRALIDXXGMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2022-12-13   
406-405 1 Libby MT CRALIDXXGMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2023-07-28   
406-405 2 Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960   2022-11-06   
406-405 3 Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960   2022-11-06   
406-405 4 Libby MT CRALIDXXKMD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 960   2023-05-14   
406-405 5 Libby MT CRALIDXXGMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2023-12-29   
406-405 6 Libby MT   453F ONVOY, LLC - MT 960   2024-04-14   
406-405 7 Libby MT   453F ONVOY, LLC - MT 960   2024-09-29   
406-405 8 Libby MT CRALIDXXX7X  453F ONVOY, LLC - MT 960   2023-08-20   
406-405 9 Libby MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 960   2024-08-27   
406-407 A Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-407 0 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-10-14   
406-407 1 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-02-06   
406-407 2 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-03-07   
406-407 3 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-05-05   
406-407 4 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-07   
406-407 5 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-07-28   
406-407 6 Kalispell MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2010-10-26   
406-407 7 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2011-07-01   
406-407 8 Kalispell MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2011-07-08   
406-407 9 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2012-04-26   
406-408 A Hays MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-408 0 Hays MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2019-11-29   
406-409 A Billings MT BLNGMTASX0X  425J CSC WIRELESS, LLC 650      
406-409 0 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2021-01-17   
406-409 1 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2021-04-22   
406-409 2 Billings MT BLNGMTASX0X  425J CSC WIRELESS, LLC 650   2019-07-20   
406-409 3 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-07-05   
406-409 4 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-409 5 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2023-01-24   
406-409 6 Billings MT   6529 T-MOBILE USA, INC. 650   2024-01-26   
406-409 7 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-07-05   
406-409 8 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2020-10-26   
406-409 9 Billings MT BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2020-10-26   
406-410 A Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-410 0 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-410 1 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-410 2 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2022-12-10   
406-410 3 Helena MT HLNAMTMAWMD  6529 T-MOBILE USA, INC. 648   2021-06-04   
406-410 4 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2023-10-29   
406-410 5 Helena MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2023-12-07   
406-410 6 Helena MT HLNAMTMAWMD  6529 T-MOBILE USA, INC. 648   2023-01-06   
406-410 7 Helena MT HLNAMTMAWMD  6529 T-MOBILE USA, INC. 648   2023-01-06   

<< 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 >>

Last updated: Sun, 06 Oct 2024 02:51:32 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.