Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 626

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-626 A Frenchtown MT FCTWMTMARS1  9636 QWEST CORPORATION 648      
406-626 0 Frenchtown MT   9636 QWEST CORPORATION 648      
406-626 1 Frenchtown MT   9636 QWEST CORPORATION 648      
406-626 2 Frenchtown MT   9636 QWEST CORPORATION 648      
406-626 3 Frenchtown MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2006-11-08   
406-626 4 Frenchtown MT   9636 QWEST CORPORATION 648      
406-626 5 Frenchtown MT   9636 QWEST CORPORATION 648      
406-626 6 Frenchtown MT   792K CHARTER IP ENABLED SERVICES, LLC 648   2024-10-14   
406-626 7 Frenchtown MT   453F ONVOY, LLC - MT 648   2007-03-19   
406-626 8 Frenchtown MT   453F ONVOY, LLC - MT 648   2011-10-29   
406-626 9 Frenchtown MT   453F ONVOY, LLC - MT 648   2023-08-20   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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