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: 879

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
559-879 A Visalia CA FRSNCA01XOY  649C ONVOY, LLC - CA 728      
559-879 0 Visalia CA FRSNCA01XOY  649C ONVOY, LLC - CA 728   2023-11-03   
559-879 1 Visalia CA FRSNCA01XOY  649C ONVOY, LLC - CA 728   2023-11-03   
559-879 2 Visalia CA   6010 NEW CINGULAR WIRELESS PCS, LLC 728   2025-11-21   
559-879 3 Visalia CA   6010 NEW CINGULAR WIRELESS PCS, LLC 728   2025-11-21   
559-879 4 Visalia CA   6010 NEW CINGULAR WIRELESS PCS, LLC 728   2025-11-21   
559-879 5 Visalia CA   6010 NEW CINGULAR WIRELESS PCS, LLC 728   2025-11-21   
559-879 6 Visalia CA FRSNCA01XOY  649C ONVOY, LLC - CA 728   2023-11-03   
559-879 7 Visalia CA   6010 NEW CINGULAR WIRELESS PCS, LLC 728   2025-11-21   
559-879 8 Visalia CA   6010 NEW CINGULAR WIRELESS PCS, LLC 728   2025-11-21   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.