Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
406-307 A Canyon Creek MT   648   2025-05-02   
406-307 1 Canyon Creek MT   648   2025-05-02   
406-309 A Kalispell MT KLSLMTAZ1MD  648      
406-309 2 Kalispell MT KLSLMTAZ1MD  648   2011-12-01   
406-313 1 Boulder MT HLNAMTHH5MD  648   2019-06-14   
406-314 4 Kalispell MT KLSLMTAZ1MD  648   2006-03-04   
406-314 6 Kalispell MT KLSLMTAZ1MD  648   2014-05-13   
406-315 1 Great Falls MT HLNAMTHH5MD  648   2011-03-10   
406-315 2 Great Falls MT HLNAMTHH5MD  648   2011-11-17   
406-315 3 Great Falls MT HLNAMTHH5MD  648   2012-05-06   
406-315 8 Great Falls MT HLNAMTHH5MD  648   2014-04-30   
406-317 1 Missoula MT MSSLMTEH4MD  648   2012-05-06   
406-319 A Polson MT MSSLMTEH4MD  648      
406-319 2 Polson MT MSSLMTEH4MD  648   2006-04-17   
406-330 A Clinton MT MSSLMTEH4MD  648      
406-330 2 Clinton MT MSSLMTEH4MD  648   2006-06-03   
406-332 1 Pablo MT MSSLMTEH4MD  648   2024-03-31   
406-333 2 Livingston MT BZMNMTEF2MD  650   2006-05-17   
406-348 5 Huntley MT   650   2025-04-08   
406-353 1 Harlem MT HLNAMTHH5MD  648   2021-04-23   
406-357 6 Chinook MT HLNAMTHH5MD  648   2021-04-23   
406-361 8 Hamilton MT MSSLMTEH4MD  648   2014-05-05   
406-371 5 Billings MT BLNGMT93HMD  650   2006-12-08   
406-371 7 Billings MT BLNGMT93HMD  650   2014-04-30   
406-375 5 Hamilton MT MSSLMTEH4MD  648   2006-05-17   
406-393 A Somers MT KLSLMTAZ1MD  648      
406-393 2 Somers MT KLSLMTAZ1MD  648   2006-05-21   
406-404 A Bozeman MT BZMNMTEF2MD  650      
406-404 1 Bozeman MT BZMNMTEF2MD  650   2012-06-01   
406-415 A Deer Lodge MT HLNAMTHH5MD  648      
406-415 1 Deer Lodge MT HLNAMTHH5MD  648   2010-06-07   
406-420 A Bigfork MT KLSLMTAZ1MD  648      
406-420 2 Bigfork MT KLSLMTAZ1MD  648   2006-04-21   
406-422 A Helena MT HLNAMTHH5MD  648      
406-422 0 Helena MT HLNAMTHH5MD  648   2006-03-14   
406-422 1 Helena MT HLNAMTHH5MD  648   2007-10-19   
406-422 4 Helena MT HLNAMTHH5MD  648   2008-04-09   
406-422 5 Helena MT HLNAMTHH5MD  648   2005-05-06   
406-445 3 Red Lodge MT BLNGMT93HMD  650   2011-03-27   
406-468 6 Cascade MT HLNAMTHH5MD  648   2020-09-05   
406-493 A Missoula MT MSSLMTEH4MD  648      
406-493 0 Missoula MT MSSLMTEH4MD  648   2006-06-19   
406-493 1 Missoula MT MSSLMTEH4MD  648   2007-10-01   
406-493 6 Missoula MT MSSLMTEH4MD  648   2005-08-13   
406-502 A Helena MT HLNAMTHH5MD  648      
406-502 1 Helena MT HLNAMTHH5MD  648   2012-06-01   
406-502 2 Helena MT HLNAMTHH5MD  648   2014-04-30   
406-513 A Helena MT HLNAMTHH5MD  648      
406-513 1 Helena MT HLNAMTHH5MD  648   2008-05-30   
406-534 A Billings MT BLNGMT93HMD  650      
406-534 1 Billings MT BLNGMT93HMD  650   2006-03-26   
406-534 2 Billings MT BLNGMT93HMD  650   2005-04-29   
406-534 3 Billings MT BLNGMT93HMD  650   2005-10-22   
406-534 4 Billings MT BLNGMT93HMD  650   2007-09-21   
406-534 6 Billings MT BLNGMT93HMD  650   2010-06-27   
406-534 8 Billings MT BLNGMT93HMD  650   2014-03-24   
406-540 4 Missoula MT MSSLMTEH4MD  648   2014-05-28   
406-551 2 Bozeman MT BZMNMTEF2MD  650   2006-12-08   
406-563 0 Anaconda MT HLNAMTHH5MD  648   2006-04-09   
406-565 5 Butte MT HLNAMTHH5MD  648   2005-05-13   
406-571 A Finley Point MT KLSLMTAZ1MD  648      
406-571 2 Finley Point MT KLSLMTAZ1MD  648   2006-04-21   
406-577 2 Bozeman MT BZMNMTEF2MD  650   2011-07-28   
406-601 1 Billings MT BLNGMT93HMD  650   2016-11-24   
406-602 7 Bozeman MT BZMNMTEF2MD  650   2021-06-23   
406-622 9 Fort Benton MT HLNAMTHH5MD  648   2017-10-08   
406-624 6 Bozeman MT BZMNMTEF2MD  650   2005-06-12   
406-625 2 Stevensville MT MSSLMTEH4MD  648   2005-10-21   
406-626 6 Frenchtown MT MSSLMTEH4MD  648   2024-10-14   
406-633 4 Laurel MT BLNGMT93HMD  650   2011-03-27   
406-680 0 Malta MT HLNAMTHH5MD  648   2021-04-23   
406-692 6 Yellow Bay MT KLSLMTAZ1MD  648   2014-06-27   
406-702 A Billings MT BLNGMT93HMD  650      
406-702 1 Billings MT BLNGMT93HMD  650   2012-05-06   
406-702 7 Billings MT BLNGMT93HMD  650   2013-12-06   
406-709 A Lakeside MT KLSLMTAZ1MD  648      
406-709 2 Lakeside MT KLSLMTAZ1MD  648      
406-718 1 Darby MT MSSLMTEH4MD  648   2024-09-08   
406-722 7 Alberton MT   648   2025-04-28   
406-730 A Whitefish MT KLSLMTAZ1MD  648      
406-730 1 Whitefish MT KLSLMTAZ1MD  648   2008-05-05   
406-730 2 Whitefish MT KLSLMTAZ1MD  648   2006-04-21   
406-730 8 Whitefish MT KLSLMTAZ1MD  648   2013-11-11   
406-770 3 Great Falls MT HLNAMTHH5MD  648   2008-06-09   
406-812 1 Laurel MT BLNGMT93HMD  650   2019-04-21   
406-813 8 Belgrade MT BZMNMTEF2MD  650   2012-03-13   
406-830 A Missoula MT MSSLMTEH4MD  648      
406-830 3 Missoula MT MSSLMTEH4MD  648   2007-04-08   
406-833 2 Ronan MT MSSLMTEH4MD  648   2024-03-31   
406-839 A Billings MT BLNGMT93HMD  650      
406-839 2 Billings MT BLNGMT93HMD  650   2007-12-02   
406-839 9 Billings MT BLNGMT93HMD  650   2006-11-21   
406-845 A Cut Bank MT HLNAMTHH5MD  648      
406-845 1 Cut Bank MT HLNAMTHH5MD  648   2009-01-02   
406-846 4 Deer Lodge MT HLNAMTHH5MD  648   2007-05-15   
406-866 0 Great Falls MT HLNAMTHH5MD  648   2006-03-13   
406-873 0 Cut Bank MT HLNAMTHH5MD  648   2006-07-03   
406-890 A Kalispell MT KLSLMTAZ1MD  648      
406-890 2 Kalispell MT KLSLMTAZ1MD  648   2007-03-03   
406-894 2 Billings MT BLNGMT93HMD  650   2014-09-30   

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Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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