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.

Switch: GRFLMTMA7MD

<< 1 2 3 4 5 6 7 8 9 10 11 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-400 7 Havre MT 453F ONVOY, LLC - MT 648   2017-07-31   
406-400 8 Havre MT 453F ONVOY, LLC - MT 648   2017-07-31   
406-400 9 Havre MT 453F ONVOY, LLC - MT 648   2017-09-18   
406-401 0 Great Falls MT 453F ONVOY, LLC - MT 648   2021-02-04   
406-401 1 Great Falls MT 453F ONVOY, LLC - MT 648   2021-02-04   
406-401 3 Great Falls MT 453F ONVOY, LLC - MT 648   2021-02-04   
406-401 4 Great Falls MT 453F ONVOY, LLC - MT 648   2021-02-04   
406-401 6 Great Falls MT 453F ONVOY, LLC - MT 648   2021-07-05   
406-401 7 Great Falls MT 453F ONVOY, LLC - MT 648   2021-07-05   
406-401 8 Great Falls MT 453F ONVOY, LLC - MT 648   2021-07-05   
406-401 9 Great Falls MT 453F ONVOY, LLC - MT 648   2021-07-05   
406-403 A Great Falls MT 453F ONVOY, LLC - MT 648      
406-403 0 Great Falls MT 453F ONVOY, LLC - MT 648   2006-05-08   
406-403 7 Great Falls MT 453F ONVOY, LLC - MT 648   2009-03-22   
406-407 7 Kalispell MT 453F ONVOY, LLC - MT 648   2011-07-01   
406-407 9 Kalispell MT 453F ONVOY, LLC - MT 648   2012-04-26   
406-415 0 Deer Lodge MT 453F ONVOY, LLC - MT 648   2021-07-05   
406-415 3 Deer Lodge MT 453F ONVOY, LLC - MT 648   2012-12-17   
406-415 5 Deer Lodge MT 453F ONVOY, LLC - MT 648   2017-11-17   
406-415 7 Deer Lodge MT 453F ONVOY, LLC - MT 648   2011-10-21   
406-415 8 Deer Lodge MT 453F ONVOY, LLC - MT 648   2019-10-28   
406-419 2 Victor MT 453F ONVOY, LLC - MT 648   2021-07-08   
406-419 4 Victor MT 453F ONVOY, LLC - MT 648   2020-11-08   
406-419 5 Victor MT 453F ONVOY, LLC - MT 648   2021-03-07   
406-419 6 Victor MT 453F ONVOY, LLC - MT 648   2021-03-07   
406-420 1 Bigfork MT 453F ONVOY, LLC - MT 648   2020-01-13   
406-420 3 Bigfork MT 453F ONVOY, LLC - MT 648   2012-12-10   
406-420 4 Bigfork MT 453F ONVOY, LLC - MT 648   2012-12-10   
406-420 5 Bigfork MT 453F ONVOY, LLC - MT 648   2012-12-10   
406-420 6 Bigfork MT 453F ONVOY, LLC - MT 648   2011-02-28   
406-420 7 Bigfork MT 453F ONVOY, LLC - MT 648   2007-04-14   
406-420 8 Bigfork MT 453F ONVOY, LLC - MT 648   2010-04-03   
406-420 9 Bigfork MT 453F ONVOY, LLC - MT 648   2019-09-15   
406-430 A Helena MT 453F ONVOY, LLC - MT 648      
406-430 0 Helena MT 453F ONVOY, LLC - MT 648   2019-05-17   
406-430 1 Helena MT 453F ONVOY, LLC - MT 648      
406-430 2 Helena MT 453F ONVOY, LLC - MT 648   2019-10-28   
406-430 3 Helena MT 453F ONVOY, LLC - MT 648   2019-11-18   
406-430 4 Helena MT 453F ONVOY, LLC - MT 648   2019-09-15   
406-430 5 Helena MT 453F ONVOY, LLC - MT 648   2019-11-18   
406-430 6 Helena MT 453F ONVOY, LLC - MT 648   2019-09-15   
406-430 7 Helena MT 453F ONVOY, LLC - MT 648   2019-11-18   
406-430 8 Helena MT 453F ONVOY, LLC - MT 648   2019-11-18   
406-430 9 Helena MT 453F ONVOY, LLC - MT 648   2020-11-30   
406-434 8 Shelby MT 453F ONVOY, LLC - MT 648   2007-03-09   
406-437 0 Helena MT 453F ONVOY, LLC - MT 648   2023-09-28   
406-468 1 Cascade MT 453F ONVOY, LLC - MT 648   2012-12-10   
406-468 7 Cascade MT 453F ONVOY, LLC - MT 648   2007-03-19   
406-470 7 Shelby MT 453F ONVOY, LLC - MT 648   2011-09-30   
406-470 8 Shelby MT 453F ONVOY, LLC - MT 648   2019-10-28   

<< 1 2 3 4 5 6 7 8 9 10 11 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.