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.

NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 837

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-837 A Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 0 Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 1 Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 2 Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 3 Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 4 Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 5 Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 6 Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 7 Bigfork MT BGFKMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-837 8 Bigfork MT HLNAMTMAUMD  508J CENTURYLINK COMMUNICATIONS, LLC 648      
406-837 9 Bigfork MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.