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.

OCN: 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT

<< 1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
406-291 8 Libby MT   960   2010-05-03   
406-291 9 Libby MT   960      
406-298 A Columbus MT BLNGMTWEIMD  650      
406-298 0 Columbus MT   650      
406-299 0 Butte MT   648   2014-07-14   
406-300 2 Kalispell MT   648   2014-07-14   
406-301 A Malta MT HLNAMTMAX1X  648      
406-301 0 Malta MT   648   2008-06-27   
406-301 1 Malta MT   648   2009-10-06   
406-301 2 Malta MT   648   2012-03-02   
406-301 3 Malta MT   648   2012-03-15   
406-301 4 Malta MT   648   2012-09-07   
406-301 8 Malta MT   648   2020-04-21   
406-303 0 Missoula MT   648   2014-10-09   
406-303 1 Missoula MT   648   2014-11-09   
406-308 A Cascade MT HLNAMTMAX1X  648      
406-308 9 Cascade MT   648   2020-11-03   
406-309 0 Kalispell MT   648   2013-03-12   
406-309 1 Kalispell MT   648   2013-03-12   
406-309 4 Kalispell MT   648   2012-09-10   
406-309 5 Kalispell MT   648   2012-10-06   
406-312 0 Bozeman MT   650      
406-312 3 Bozeman MT   650      
406-314 8 Kalispell MT   648   2012-03-28   
406-317 2 Missoula MT   648   2013-03-12   
406-317 3 Missoula MT   648   2013-03-12   
406-320 A Roundup MT BLNGMTWEIMD  650      
406-320 0 Roundup MT   650      
406-320 1 Roundup MT   650      
406-320 2 Roundup MT   650      
406-324 0 Helena MT   648   2024-06-22   
406-324 8 Helena MT   648   2025-02-12   
406-331 A Roundup MT BLNGMTWEIMD  650      
406-331 0 Roundup MT   650      
406-333 8 Livingston MT   650   2023-07-10   
406-334 3 Libby MT   960   2011-08-02   
406-334 6 Libby MT   960   2020-12-15   
406-334 7 Libby MT   960   2013-03-12   
406-334 9 Libby MT   960   2017-08-17   
406-344 A Havre MT HLNAMTMAX1X  648      
406-344 0 Havre MT   648   2018-01-12   
406-344 2 Havre MT   648   2018-01-20   
406-344 3 Havre MT   648   2016-09-11   
406-346 0 Forsyth MT   650   2023-07-18   
406-351 A Forsyth MT BLNGMTWEIMD  650      
406-351 1 Forsyth MT   650      
406-351 2 Forsyth MT   650      
406-351 3 Forsyth MT   650      
406-351 9 Forsyth MT   650      
406-353 5 Harlem MT   648   2020-02-24   
406-353 9 Harlem MT   648   2023-07-10   
406-357 5 Chinook MT   648   2023-01-05   
406-357 7 Chinook MT   648   2020-02-24   
406-359 9 Glendive MT   650   2018-12-17   
406-360 A Hamilton MT HLNAMTMAX1X  648      
406-361 A Hamilton MT HLNAMTMAX1X  648      
406-361 0 Hamilton MT   648   2011-07-24   
406-361 1 Hamilton MT   648   2012-10-02   
406-361 5 Hamilton MT   648   2014-04-24   
406-361 9 Hamilton MT   648   2018-01-05   
406-366 A Lewistown MT HLNAMTMAX1X  648      
406-366 0 Lewistown MT   648      
406-366 1 Lewistown MT   648      
406-366 2 Lewistown MT   648      
406-366 3 Lewistown MT   648      
406-366 4 Lewistown MT   648      
406-366 5 Lewistown MT   648      
406-366 6 Lewistown MT   648      
406-366 8 Lewistown MT   648   2025-10-03   
406-366 9 Lewistown MT   648      
406-369 5 Hamilton MT   648   2008-11-18   
406-370 A Missoula MT HLNAMTMAX1X  648      
406-380 A Lewistown MT HLNAMTMAX1X  648      
406-380 0 Lewistown MT   648      
406-380 1 Lewistown MT   648   2021-04-22   
406-380 2 Lewistown MT   648   2011-08-08   
406-381 A Hamilton MT HLNAMTMAX1X  648      
406-384 8 Billings MT   650   2018-04-09   
406-390 A South Havre MT HLNAMTMAX1X  648      
406-390 0 South Havre MT   648      
406-390 1 South Havre MT   648      
406-390 2 South Havre MT   648      
406-390 3 South Havre MT   648      
406-390 4 South Havre MT   648      
406-390 5 South Havre MT   648      
406-390 6 South Havre MT   648      
406-396 A Missoula MT HLNAMTMAX1X  648      
406-399 A South Havre MT HLNAMTMAX1X  648      
406-399 0 South Havre MT   648      
406-399 1 South Havre MT   648      
406-399 2 South Havre MT   648   2010-09-07   
406-399 3 South Havre MT   648   2009-06-04   
406-399 4 South Havre MT   648   2009-12-07   
406-399 5 South Havre MT   648   2010-03-08   
406-399 6 South Havre MT   648   2011-01-07   
406-399 7 South Havre MT   648   2011-04-04   
406-403 1 Great Falls MT   648   2009-04-09   
406-403 2 Great Falls MT   648   2009-07-06   
406-403 3 Great Falls MT   648   2009-09-14   
406-403 4 Great Falls MT   648   2009-10-22   

<< 1 2 3 4 5 6 7 8 >>

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.