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: 323

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-323 A Chula Vista CA SNDACAGLDS2  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 732      
858-323 0 Chula Vista CA SNDGCA02XHX  939H COMMIO, LLC 732   2021-09-24   
858-323 1 Chula Vista CA SNDGCA02XHX  939H COMMIO, LLC 732   2021-09-24   
858-323 2 Chula Vista CA SNDACAGLDS2  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 732   2021-09-23   
858-323 3 Chula Vista CA SNDGCA02XHX  939H COMMIO, LLC 732   2021-09-24   
858-323 4 Chula Vista CA SNDGCA02XHX  939H COMMIO, LLC 732   2021-09-24   
858-323 5 Chula Vista CA SNDGCA02XHX  939H COMMIO, LLC 732   2021-09-24   
858-323 6 Chula Vista CA ESCNCAKY2MD  6529 T-MOBILE USA, INC. 732   2021-09-24   
858-323 7 Chula Vista CA ESCNCAKY2MD  6529 T-MOBILE USA, INC. 732   2021-09-24   
858-323 8 Chula Vista CA SNDGCA0260Z  624H ONVOY SPECTRUM, LLC 732   2021-11-12   
858-323 9 Chula Vista CA SNDGCA0260Z  624H ONVOY SPECTRUM, LLC 732   2021-11-12   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.