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: BLNGMT934MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-888 1 Old Faithful WY 939H COMMIO, LLC 650   2022-04-01   
406-359 5 Glendive MT 939H COMMIO, LLC 650   2022-11-13   
406-416 8 Forsyth MT 939H COMMIO, LLC 650   2022-06-06   
406-530 0 Laurel MT 939H COMMIO, LLC 650   2022-07-29   
406-613 0 Bozeman MT 939H COMMIO, LLC 650   2022-08-19   
406-703 8 Columbus MT 939H COMMIO, LLC 650   2021-11-14   
406-703 9 Columbus MT 939H COMMIO, LLC 650   2021-11-14   
406-851 0 Miles City MT 939H COMMIO, LLC 650   2022-07-29   
406-894 A Billings MT 939H COMMIO, LLC 650      
406-894 1 Billings MT 939H COMMIO, LLC 650   2022-09-11   
406-894 4 Billings MT 939H COMMIO, LLC 650   2019-10-27   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.