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: RDNGCAGA0MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-260 A Susanville CA 6261 UNITED STATES CELLULAR - CA 724      
530-261 A Mount Shasta CA 6261 UNITED STATES CELLULAR - CA 724      
530-640 A Alturas CA 6261 UNITED STATES CELLULAR - CA 724      
530-739 A Weaverville CA 6261 UNITED STATES CELLULAR - CA 724      
530-905 A Yreka CA 6261 UNITED STATES CELLULAR - CA 724      
530-931 A Susanville CA 6261 UNITED STATES CELLULAR - CA 724      

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

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