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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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
909-914 5 Diamond Bar CA 649C ONVOY, LLC - CA 730   2021-07-30   
909-925 6 Chino CA 649C ONVOY, LLC - CA 730   2023-11-12   
909-929 7 Claremont-San Dimas CA 649C ONVOY, LLC - CA 730   2013-09-22   
909-962 0 Claremont-San Dimas CA 649C ONVOY, LLC - CA 730   2008-12-06   
909-970 2 Chino CA 649C ONVOY, LLC - CA 730   2021-11-19   
909-970 3 Chino CA 649C ONVOY, LLC - CA 730   2021-11-19   
909-978 2 Diamond Bar CA 649C ONVOY, LLC - CA 730   2012-04-02   
909-978 4 Diamond Bar CA 649C ONVOY, LLC - CA 730   2007-02-11   

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Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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