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: 434

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-434 A Rancho Penasquitos CA SNDJCA05DS0  7262 XO CALIFORNIA, INC. 732      
858-434 0 Rancho Penasquitos CA   7262 XO CALIFORNIA, INC. 732      
858-434 1 Rancho Penasquitos CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2013-03-21   
858-434 2 Rancho Penasquitos CA   7262 XO CALIFORNIA, INC. 732      
858-434 3 Rancho Penasquitos CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2013-03-21   
858-434 4 Rancho Penasquitos CA   7262 XO CALIFORNIA, INC. 732      
858-434 5 Rancho Penasquitos CA   649C ONVOY, LLC - CA 732   2020-03-02   
858-434 6 Rancho Penasquitos CA   7262 XO CALIFORNIA, INC. 732      
858-434 7 Rancho Penasquitos CA   649C ONVOY, LLC - CA 732   2021-07-22   
858-434 8 Rancho Penasquitos CA   649C ONVOY, LLC - CA 732   2020-03-02   
858-434 9 Rancho Penasquitos CA   7262 XO CALIFORNIA, INC. 732      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.