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: PCBHCA01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
619-275 A San Diego: San Diego DA CA 9740 PACIFIC BELL 732      
619-276 A San Diego: San Diego DA CA 9740 PACIFIC BELL 732      
858-270 A La Jolla CA 9740 PACIFIC BELL 732      
858-272 A La Jolla CA 9740 PACIFIC BELL 732      
858-273 A La Jolla CA 9740 PACIFIC BELL 732      
858-274 A La Jolla CA 9740 PACIFIC BELL 732      
858-483 A La Jolla CA 9740 PACIFIC BELL 732      
858-490 A La Jolla CA 9740 PACIFIC BELL 732      
858-581 A La Jolla CA 9740 PACIFIC BELL 732      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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