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: 605

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-605 A Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 0 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 1 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 2 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 3 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 4 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 5 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 6 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 7 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      
858-605 8 Rancho Bernardo CA SNDICAETAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 732   2010-10-16   
858-605 9 Rancho Bernardo CA   829J PAETEC ITEL, LLC 732      

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.