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: 873

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-873 A Cut Bank MT CTBNMTMARS1  9636 QWEST CORPORATION 648      
406-873 0 Cut Bank MT   792K CHARTER IP ENABLED SERVICES, LLC 648      
406-873 1 Cut Bank MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-873 2 Cut Bank MT CTBNMTMARS1  9636 QWEST CORPORATION 648      
406-873 3 Cut Bank MT CTBNMTMARS1  9636 QWEST CORPORATION 648      
406-873 4 Cut Bank MT CTBNMTMARS1  9636 QWEST CORPORATION 648      
406-873 5 Cut Bank MT CTBNMTMARS1  9636 QWEST CORPORATION 648      
406-873 6 Cut Bank MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-873 7 Cut Bank MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648      
406-873 8 Cut Bank MT MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-873 9 Cut Bank MT CTBNMTMARS1  9636 QWEST CORPORATION 648      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.