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
406-946 8 Livingston MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-10-28   
406-946 9 Livingston MT BLNGMT933MD  073H TELNYX LLC 650   2017-03-31   
406-947 A Musselshell MT RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-948 A Glendive MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-948 0 Glendive MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-948 1 Glendive MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2011-08-11   
406-948 2 Glendive MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2011-08-11   
406-948 3 Glendive MT BLNGMTWEAMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2010-10-01   
406-948 4 Glendive MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-948 5 Glendive MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-948 6 Glendive MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2013-01-24   
406-948 7 Glendive MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-948 8 Glendive MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2015-08-10   
406-948 9 Glendive MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-949 A Townsend MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-949 0 Townsend MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-949 1 Townsend MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-949 2 Townsend MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-949 3 Townsend MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-949 4 Townsend MT   145J TERRA NOVA TELECOM INC. 648   2025-10-11   
406-951 A Miles City MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-951 0 Miles City MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-951 1 Miles City MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-951 2 Miles City MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-951 3 Miles City MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-951 4 Miles City MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-951 6 Miles City MT BLNGMT939MD  145J TERRA NOVA TELECOM INC. 650   2024-02-12   
406-951 8 Miles City MT   145J TERRA NOVA TELECOM INC. 650   2025-02-14   
406-951 9 Miles City MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2024-04-14   
406-952 A Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648      
406-952 0 Great Falls MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2007-02-07   
406-952 1 Great Falls MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2008-06-20   
406-952 2 Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2019-11-25   
406-952 3 Great Falls MT HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2006-11-30   
406-952 4 Great Falls MT HLNAMTHH5MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2005-07-17   
406-952 5 Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2021-10-30   
406-952 6 Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2021-10-30   
406-952 7 Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2020-08-05   
406-952 8 Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2020-08-05   
406-952 9 Great Falls MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2020-08-05   
406-953 A Hardin MT   443B SAGEBRUSH CELLULAR, INC. 650      
406-953 0 Hardin MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-953 2 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-03-07   
406-953 3 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-03-07   
406-953 4 Hardin MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-953 5 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-01-05   
406-953 6 Hardin MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-01-05   
406-953 8 Hardin MT   443B SAGEBRUSH CELLULAR, INC. 650   2019-01-10   
406-953 9 Hardin MT   443B SAGEBRUSH CELLULAR, INC. 650   2019-01-10   
406-954 A Roy MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-954 0 Roy MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-955 A Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2024-01-18   
406-955 1 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2024-08-22   
406-955 2 Kalispell MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648   2025-05-29   
406-955 3 Kalispell MT   6529 T-MOBILE USA, INC. 648   2025-10-12   
406-955 4 Kalispell MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648   2025-05-29   
406-955 5 Kalispell MT MSSLMTMACMD  5562 METROPCS, INC. 648   2024-10-14   
406-955 6 Kalispell MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648   2024-02-01   
406-955 7 Kalispell MT   6010 NEW CINGULAR WIRELESS PCS, LLC 648   2025-05-29   
406-955 8 Kalispell MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2024-01-19   
406-955 9 Kalispell MT MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648   2024-01-19   
406-956 A Baker MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650      
406-956 0 Baker MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2010-12-17   
406-957 A Terry MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-957 0 Terry MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-957 1 Terry MT BLNGMT93DS0  588H AIRUS, INC. - MT 650   2020-03-01   
406-957 2 Terry MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2021-03-07   
406-957 3 Terry MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2023-02-27   
406-957 6 Terry MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-957 7 Terry MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-957 8 Terry MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-957 9 Terry MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-960 A Dillon MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-960 0 Dillon MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-960 4 Dillon MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-961 A Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 0 Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 1 Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 3 Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 4 Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 5 Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 6 Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 7 Hamilton MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2011-01-23   
406-961 8 Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 9 Hamilton MT MSSLMTEH4MD  792K CHARTER IP ENABLED SERVICES, LLC 648   2008-11-21   
406-962 A Joliet MT JOLTMTMARS1  9636 QWEST CORPORATION 650      
406-962 0 Joliet MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2004-11-13   
406-962 1 Joliet MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2008-07-17   
406-962 2 Joliet MT   145J TERRA NOVA TELECOM INC. 650   2020-11-19   
406-962 3 Joliet MT JOLTMTMARS1  9636 QWEST CORPORATION 650      
406-962 4 Joliet MT JOLTMTMARS1  9636 QWEST CORPORATION 650      
406-962 5 Joliet MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2008-11-26   
406-962 6 Joliet MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2010-02-20   
406-962 7 Joliet MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2007-03-19   
406-962 9 Joliet MT JOLTMTMARS1  9636 QWEST CORPORATION 650      
406-963 A Froid Rural MT FRODMT01RS0  2247 NEMONT TEL COOP INC 650      
406-963 2 Froid Rural MT FRODMT01RS0  2247 NEMONT TEL COOP INC 650      
406-963 7 Froid Rural MT GLSGMTXC1MD  443B SAGEBRUSH CELLULAR, INC. 650      
406-964 A Great Falls MT VGHNMTMARS1  9636 QWEST CORPORATION 648      
406-964 0 Great Falls MT VGHNMTMARS1  9636 QWEST CORPORATION 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: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.