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.

NPA: 858 [Rate centres in NPA 858] [Dial plan for NPA 858]

NXX: 404

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-404 A La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 0 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 1 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 2 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 3 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 4 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 5 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 6 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 7 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 8 La Jolla CA SNDGCA15DS0  9740 PACIFIC BELL 732      
858-404 9 La Jolla CA SNDGCA02XOZ  7147 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 732      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.