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: 559 [Rate centres in NPA 559] [Dial plan for NPA 559]

NXX: 923

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
559-923 A Laton CA LATNCA11RS0  9740 PACIFIC BELL 728      
559-923 1 Laton CA LATNCA11RS0  9740 PACIFIC BELL 728      
559-923 3 Laton CA FRSNCA01XXZ  145J TERRA NOVA TELECOM INC. 728   2021-01-09   
559-923 4 Laton CA LATNCA11RS0  9740 PACIFIC BELL 728      
559-923 5 Laton CA LATNCA11RS0  9740 PACIFIC BELL 728      
559-923 9 Laton CA   145J TERRA NOVA TELECOM INC. 728   2021-10-02   

Last updated: Fri, 10 Sep 2021 12:38:21 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.