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.

Froid Rural, MT

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-963 A FRODMT01RS0  2247 NEMONT TEL COOP INC 650      
406-963 2   2247 NEMONT TEL COOP INC 650      
406-963 7   443B SAGEBRUSH CELLULAR, INC. 650      

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.