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: SNDGCA02XHX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
442-393 A Calipatria CA 939H COMMIO, LLC 732      
442-412 A Brawley CA 939H COMMIO, LLC 732      
619-909 A San Diego: San Diego DA CA 939H COMMIO, LLC 732      
760-319 A Holtville CA 939H COMMIO, LLC 732      
760-426 A Julian CA 939H COMMIO, LLC 732      
760-869 A Ramona CA 939H COMMIO, LLC 732      
858-317 A Dulzura CA 939H COMMIO, LLC 732      
858-363 A Jacumba CA 939H COMMIO, LLC 732      
858-392 A San Diego: Linda Vista DA CA 939H COMMIO, LLC 732   2024-03-04   
858-393 A Del Mar CA 939H COMMIO, LLC 732   2024-03-04   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.