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.
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Switch: DNGNCA12RS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-724 A Dunnigan CA 9740 PACIFIC BELL 726      
530-724 0 Dunnigan CA 9740 PACIFIC BELL 726      
530-724 1 Dunnigan CA 9740 PACIFIC BELL 726      
530-724 3 Dunnigan CA 9740 PACIFIC BELL 726      
530-724 4 Dunnigan CA 9740 PACIFIC BELL 726      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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