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: SNDGCA07DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
619-358 A San Diego: San Diego DA CA 7421 AT&T - LOCAL 732      
760-331 A Oceanside: Carlsbad DA CA 7421 AT&T - LOCAL 732      
760-484 A Escondido CA 7421 AT&T - LOCAL 732      
760-545 A Imperial CA 7421 AT&T - LOCAL 732      
858-304 A Rancho Bernardo CA 7421 AT&T - LOCAL 732      
858-369 A Del Mar CA 7421 AT&T - LOCAL 732      
858-431 A La Jolla CA 7421 AT&T - LOCAL 732      
858-633 A San Diego: Linda Vista DA CA 7421 AT&T - LOCAL 732      
858-740 A San Diego: Mira Mesa DA CA 7421 AT&T - LOCAL 732      

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

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