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: MSSLMTMA0MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-909 5 Columbia Falls MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2023-04-24   
406-960 A Dillon MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-960 0 Dillon MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-960 4 Dillon MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-961 7 Hamilton MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2011-01-23   
406-966 A Shelby MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-966 0 Shelby MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-966 4 Shelby MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-968 A Lewistown MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-968 0 Lewistown MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-968 4 Lewistown MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-980 7 Townsend MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2023-02-27   
406-982 1 Yellow Bay MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2023-03-02   
406-988 A Dillon MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648      
406-988 4 Dillon MT 9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2005-03-02   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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