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.

OCN: 4189 SHELLSBURG CABLEVISION, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
319-434 A Belle Plaine IA BLTWIAXO1MD  635      
319-741 A Marengo IA BLTWIAXO1MD  635      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.