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: SNDGCA0268Z

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
858-952 7 La Jolla CA 394L COMCAST PHONE OF CALIFORNIA, LLC 732   2006-05-23   
858-966 0 San Diego: Linda Vista DA CA 394L COMCAST PHONE OF CALIFORNIA, LLC 732   2010-06-30   
858-966 9 San Diego: Linda Vista DA CA 394L COMCAST PHONE OF CALIFORNIA, LLC 732   2010-06-30   
858-987 5 San Diego: Linda Vista DA CA 394L COMCAST PHONE OF CALIFORNIA, LLC 732   2015-11-22   
858-987 7 San Diego: Linda Vista DA CA 394L COMCAST PHONE OF CALIFORNIA, LLC 732   2015-08-03   
858-988 2 San Diego: San Diego DA CA 394L COMCAST PHONE OF CALIFORNIA, LLC 732   2019-12-25   

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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