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: 858

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-858 A Kalispell MT GRFLMTMA69Z  490J DISH WIRELESS, LLC 648      
406-858 0 Kalispell MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-858 1 Kalispell MT CHRLMT010MD  986F WESTERN MONTANA COMMUNITYTEL INC. - MT 648      
406-858 2 Kalispell MT KLSLMTXCDS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-858 3 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-858 4 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-858 5 Kalispell MT GRFLMTMA69Z  490J DISH WIRELESS, LLC 648      
406-858 6 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-858 7 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-858 8 Kalispell MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-858 9 Kalispell MT GRFLMTMAHMD  073H TELNYX LLC 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.