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
925-966 4 Antioch CA 649C ONVOY, LLC - CA 722   2021-09-24   
925-968 2 Bishop Ranch CA 649C ONVOY, LLC - CA 722   2016-04-23   
925-968 3 Bishop Ranch CA 649C ONVOY, LLC - CA 722   2016-04-23   
925-995 6 Concord CA 649C ONVOY, LLC - CA 722   2026-06-22   
925-999 4 Dublin-San Ramon CA 649C ONVOY, LLC - CA 722   2016-04-04   
925-999 7 Dublin-San Ramon CA 649C ONVOY, LLC - CA 722   2011-11-25   

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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