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: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-521 A Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 0 Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 1 Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 2 Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 3 Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 4 Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 5 Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 6 Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 7 Rancho Bernardo CA RBRNCA11DS0  9740 PACIFIC BELL 732      
858-521 8 Rancho Bernardo CA SNDGCA0241Z  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 732   2007-09-18   
858-521 9 Rancho Bernardo CA SNDGCA0241Z  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 732   2007-09-18   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.