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: SNDGCAJWDS0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
858-900 A La Jolla CA 649C ONVOY, LLC - CA 732      
858-910 A Chula Vista CA 649C ONVOY, LLC - CA 732      
858-927 A Rancho Bernardo CA 649C ONVOY, LLC - CA 732      
858-987 A San Diego: Linda Vista DA CA 649C ONVOY, LLC - CA 732      
858-999 A La Jolla CA 649C ONVOY, LLC - CA 732      

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

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