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: CHICCACW7MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-260 5 Susanville CA 145J TERRA NOVA TELECOM INC. 724   2026-01-04   
530-267 8 Chico CA 145J TERRA NOVA TELECOM INC. 724   2026-04-30   
530-299 8 Adin CA 145J TERRA NOVA TELECOM INC. 724   2026-01-04   
530-572 A Yreka CA 145J TERRA NOVA TELECOM INC. 724      
530-640 6 Alturas CA 145J TERRA NOVA TELECOM INC. 724   2026-01-04   
530-779 7 Millville CA 145J TERRA NOVA TELECOM INC. 724   2026-01-04   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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