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: 350 [Rate centres in NPA 350] [Dial plan for NPA 350]

NXX: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-203 A Dos Palos CA FRSNCA01TMD  939H COMMIO, LLC 728   2024-02-23   
350-203 0 Dos Palos CA FRSNCA01TMD  939H COMMIO, LLC 728      
350-203 1 Dos Palos CA FRSNCA01TMD  939H COMMIO, LLC 728      
350-203 2 Dos Palos CA   981E BANDWIDTH.COM CLEC, LLC - CA 728      
350-203 3 Dos Palos CA   649C ONVOY, LLC - CA 728      
350-203 8 Dos Palos CA   649C ONVOY, LLC - CA 728      
350-203 9 Dos Palos CA   649C ONVOY, LLC - CA 728      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.