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: 380

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-380 A Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-380 0 Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-380 1 Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2021-04-22   
406-380 2 Lewistown MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-08-08   
406-380 3 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2020-01-03   
406-380 4 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-09-15   
406-380 5 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2022-12-04   
406-380 7 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   
406-380 8 Lewistown MT GRFLMTMAHMD  073H TELNYX LLC 648   2020-08-13   
406-380 9 Lewistown MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-07-05   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.