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.

Switch: MSSLMTMADS0

Remotes:

Switch Switch name Switch type
FCTWMTMARS1  FRENCHTOWN  5ER 
LOLOMTMARS1  LOLO  5ER 
MLTWMTMARS1  MILLTOWN  5ER 
MSSLMTSORS1  MISSOULA SOUTH  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-218 3 Missoula MT 9636 QWEST CORPORATION 648   2013-02-25   
406-218 5 Missoula MT 9636 QWEST CORPORATION 648   2013-02-25   
406-243 A Missoula MT 9636 QWEST CORPORATION 648      
406-258 1 Missoula MT 9636 QWEST CORPORATION 648   2006-07-10   
406-258 3 Missoula MT 9636 QWEST CORPORATION 648      
406-258 4 Missoula MT 9636 QWEST CORPORATION 648      
406-327 A Missoula MT 9636 QWEST CORPORATION 648      
406-329 A Missoula MT 9636 QWEST CORPORATION 648      
406-493 3 Missoula MT 9636 QWEST CORPORATION 648   2009-03-30   
406-523 A Missoula MT 9636 QWEST CORPORATION 648      
406-542 A Missoula MT 9636 QWEST CORPORATION 648      
406-543 A Missoula MT 9636 QWEST CORPORATION 648      
406-549 A Missoula MT 9636 QWEST CORPORATION 648      
406-552 6 Missoula MT 9636 QWEST CORPORATION 648   2006-04-25   
406-721 A Missoula MT 9636 QWEST CORPORATION 648      
406-728 A Missoula MT 9636 QWEST CORPORATION 648      
406-829 A Missoula MT 9636 QWEST CORPORATION 648      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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