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: SNCZCA01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-420 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-421 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-423 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-425 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-426 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-427 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-429 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-435 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-454 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-457 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-458 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-459 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-460 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-466 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-469 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-471 A Santa Cruz CA 9740 PACIFIC BELL 722      
831-502 A Santa Cruz CA 9740 PACIFIC BELL 722      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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