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.

OCN: 743G WIDE VOICE, LLC - MT

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
406-708 A Lewistown MT   648      
406-708 1 Lewistown MT   648   2025-08-12   
406-934 A Miles City MT   650      
406-934 1 Miles City MT   650   2025-07-22   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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