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: BKLYCA01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
510-356 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-495 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-642 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-643 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-647 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-649 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-664 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-665 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-666 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-704 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-705 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-845 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-848 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      
510-981 A Oakland: Berkeley DA CA 9740 PACIFIC BELL 722      

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

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