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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SNFCCAMKDS3

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
925-471 A Concord CA 649C ONVOY, LLC - CA 722      
925-486 A Danville CA 649C ONVOY, LLC - CA 722   2024-06-20   
925-491 A Antioch CA 649C ONVOY, LLC - CA 722      
925-500 A Martinez CA 649C ONVOY, LLC - CA 722      
925-508 A East Contra Costa CA 649C ONVOY, LLC - CA 722      
925-512 A Walnut Creek CA 649C ONVOY, LLC - CA 722      
925-515 A Concord CA 649C ONVOY, LLC - CA 722   2024-01-21   
925-517 A Pittsburg West CA 649C ONVOY, LLC - CA 722      
925-529 A Antioch CA 649C ONVOY, LLC - CA 722      
925-718 A Danville CA 649C ONVOY, LLC - CA 722      
925-732 A Antioch CA 649C ONVOY, LLC - CA 722      
925-794 A Moraga CA 649C ONVOY, LLC - CA 722      
925-800 A Livermore CA 649C ONVOY, LLC - CA 722      
925-860 A Sunol CA 649C ONVOY, LLC - CA 722   2024-03-05   
925-871 A Lafayette CA 649C ONVOY, LLC - CA 722      
925-900 A Lafayette CA 649C ONVOY, LLC - CA 722      
925-925 A Concord CA 649C ONVOY, LLC - CA 722      
925-940 A Walnut Creek CA 649C ONVOY, LLC - CA 722      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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