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: ORNDCA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
925-253 A Orinda CA 9740 PACIFIC BELL 722      
925-254 A Orinda CA 9740 PACIFIC BELL 722      
925-258 A Orinda CA 9740 PACIFIC BELL 722      
925-258 0 Orinda CA 9740 PACIFIC BELL 722      
925-258 1 Orinda CA 9740 PACIFIC BELL 722      
925-258 3 Orinda CA 9740 PACIFIC BELL 722      
925-258 4 Orinda CA 9740 PACIFIC BELL 722      
925-258 6 Orinda CA 9740 PACIFIC BELL 722      
925-258 9 Orinda CA 9740 PACIFIC BELL 722      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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