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: 387

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-387 A Hungry Horse MT HNHRMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-387 0 Hungry Horse MT GRFLMTMAHMD  073H TELNYX LLC 648      
406-387 1 Hungry Horse MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-387 2 Hungry Horse MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-387 3 Hungry Horse MT HNHRMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-387 4 Hungry Horse MT HNHRMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-387 5 Hungry Horse MT HNHRMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-387 6 Hungry Horse MT MSSLMTMACMD  6529 T-MOBILE USA, INC. 648      
406-387 7 Hungry Horse MT HLNAMTMAUMD  508J CENTURYLINK COMMUNICATIONS, LLC 648      
406-387 8 Hungry Horse MT   6529 T-MOBILE USA, INC. 648      
406-387 9 Hungry Horse MT HNHRMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.