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: 466

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-466 A La Mesa CA SNDGCA0263Z  965H FRACTEL, LLC 732      
858-466 0 La Mesa CA   649C ONVOY, LLC - CA 732   2021-07-22   
858-466 1 La Mesa CA   649C ONVOY, LLC - CA 732   2021-07-22   
858-466 2 La Mesa CA   649C ONVOY, LLC - CA 732   2021-07-22   
858-466 3 La Mesa CA   649C ONVOY, LLC - CA 732   2021-07-22   
858-466 4 La Mesa CA   649C ONVOY, LLC - CA 732   2021-10-03   
858-466 5 La Mesa CA   649C ONVOY, LLC - CA 732   2021-10-03   
858-466 6 La Mesa CA   965H FRACTEL, LLC 732   2021-05-14   
858-466 7 La Mesa CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 732   2021-08-26   
858-466 8 La Mesa CA   649C ONVOY, LLC - CA 732   2022-10-15   
858-466 9 La Mesa CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 732   2021-10-26   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.