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: 500

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-500 A La Jolla CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732      
858-500 0 La Jolla CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732   2012-06-16   
858-500 1 La Jolla CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732   2022-05-28   
858-500 2 La Jolla CA SNDGCA51CM3  6010 NEW CINGULAR WIRELESS PCS, LLC 732   2012-10-22   
858-500 3 La Jolla CA SNDACAGLDS2  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 732   2012-06-25   
858-500 4 La Jolla CA SNDGCA0284Z  4733 PAETEC COMMUNICATIONS, INC. - CA 732   2012-07-02   
858-500 5 La Jolla CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732   2012-07-09   
858-500 6 La Jolla CA SNDICAETAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 732   2012-09-07   
858-500 7 La Jolla CA SNDGCA0268Z  318J COMCAST IP PHONE, LLC 732   2012-08-03   
858-500 8 La Jolla CA SNDGCA0268Z  318J COMCAST IP PHONE, LLC 732   2012-07-13   
858-500 9 La Jolla CA SNDICAETAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 732   2012-10-16   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.