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: 319 [Rate centres in NPA 319] [Dial plan for NPA 319]

NXX: 424

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-424 A Cedar Rapids IA   700J WAVENATION, LLC 635   2026-01-22   
319-424 0 Cedar Rapids IA   700J WAVENATION, LLC 635   2026-01-22   
319-424 1 Cedar Rapids IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 635   2026-04-17   
319-424 2 Cedar Rapids IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 635   2026-04-17   
319-424 3 Cedar Rapids IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 635   2026-04-17   
319-424 5 Cedar Rapids IA   6529 T-MOBILE USA, INC. 635   2026-05-02   
319-424 8 Cedar Rapids IA   985E BANDWIDTH.COM CLEC, LLC - IA 635   2026-05-03   
319-424 9 Cedar Rapids IA   985E BANDWIDTH.COM CLEC, LLC - IA 635   2026-05-03   

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.