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: SRVLCA11RS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-994 A Sierraville CA 9740 PACIFIC BELL 724      
530-994 1 Sierraville CA 9740 PACIFIC BELL 724      
530-994 3 Sierraville CA 9740 PACIFIC BELL 724      

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

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