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: 9415 LEVEL 3 COMMUNICATIONS, LLC - MT

1 2 3 4 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
406-203 A Missoula MT MSSLMTMA6MD  648      
406-203 0 Missoula MT   648      
406-203 1 Missoula MT   648      
406-203 3 Missoula MT   648   2012-02-26   
406-203 4 Missoula MT   648      
406-203 5 Missoula MT   648   2012-08-25   
406-203 9 Missoula MT   648   2014-10-24   
406-204 A Helena MT HLNAMTMAIMD  648      
406-204 0 Helena MT   648      
406-204 3 Helena MT   648   2011-11-25   
406-204 4 Helena MT   648      
406-205 A Great Falls MT MSSLMTMA0MD  648      
406-205 0 Great Falls MT   648      
406-205 1 Great Falls MT   648      
406-205 2 Great Falls MT   648      
406-205 3 Great Falls MT   648      
406-205 4 Great Falls MT   648      
406-205 5 Great Falls MT   648      
406-205 6 Great Falls MT   648      
406-205 7 Great Falls MT   648      
406-205 8 Great Falls MT   648      
406-206 A Billings MT BLNGMTWE6MD  650      
406-213 A Colstrip MT BLNGMTWE2MD  650      
406-213 0 Colstrip MT   650      
406-213 4 Colstrip MT   650      
406-218 2 Missoula MT   648   2016-04-21   
406-219 0 Bozeman MT   650   2006-10-24   
406-233 6 Miles City MT   650   2005-02-21   
406-235 1 Wolf Creek MT   648   2006-11-08   
406-278 2 Conrad MT   648   2013-01-11   
406-278 6 Conrad MT   648   2006-07-10   
406-282 0 Manhattan MT   650   2004-11-13   
406-283 3 Libby MT   960   2017-04-01   
406-283 8 Libby MT   960   2019-12-13   
406-285 2 Three Forks MT   650   2004-11-13   
406-290 0 Columbus MT   650   2007-12-17   
406-290 1 Columbus MT   650   2008-01-28   
406-290 2 Columbus MT   650   2008-02-04   
406-292 2 Joplin MT   648   2019-01-18   
406-295 8 Troy MT   960   2017-04-01   
406-298 1 Columbus MT   650   2008-02-29   
406-299 A Butte MT HLNAMTMAIMD  648      
406-299 8 Butte MT   648   2013-02-28   
406-299 9 Butte MT   648      
406-301 5 Malta MT   648   2019-01-11   
406-302 3 Wolf Creek MT   648   2019-06-28   
406-305 1 White Sulphur Springs MT   650   2019-01-11   
406-309 6 Kalispell MT   648   2018-08-26   
406-317 7 Missoula MT   648   2020-09-19   
406-320 3 Roundup MT   650   2019-10-10   

1 2 3 4 >>

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.