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: SNDGCA15DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
858-334 A La Jolla CA 9740 PACIFIC BELL 732      
858-404 A La Jolla CA 9740 PACIFIC BELL 732      
858-452 A La Jolla CA 9740 PACIFIC BELL 732      
858-453 A La Jolla CA 9740 PACIFIC BELL 732      
858-455 A La Jolla CA 9740 PACIFIC BELL 732      
858-525 A La Jolla CA 9740 PACIFIC BELL 732      
858-534 A La Jolla CA 9740 PACIFIC BELL 732      
858-535 A La Jolla CA 9740 PACIFIC BELL 732      
858-546 A La Jolla CA 9740 PACIFIC BELL 732      
858-552 A La Jolla CA 9740 PACIFIC BELL 732      
858-554 A La Jolla CA 9740 PACIFIC BELL 732      
858-597 A La Jolla CA 9740 PACIFIC BELL 732      
858-623 A La Jolla CA 9740 PACIFIC BELL 732      
858-625 A La Jolla CA 9740 PACIFIC BELL 732      
858-626 A La Jolla CA 9740 PACIFIC BELL 732      
858-642 A La Jolla CA 9740 PACIFIC BELL 732      
858-643 A La Jolla CA 9740 PACIFIC BELL 732      
858-646 A La Jolla CA 9740 PACIFIC BELL 732      
858-822 A La Jolla CA 9740 PACIFIC BELL 732      
858-824 A La Jolla CA 9740 PACIFIC BELL 732      
858-826 A La Jolla CA 9740 PACIFIC BELL 732      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.