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.

Switch: BLTWIAXO1MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-434 A Belle Plaine IA 4189 SHELLSBURG CABLEVISION, INC. 635      
319-454 A Blairstown IA 1136 SHELLSBURG CABLEVISION, INC. 635      
319-741 A Marengo IA 4189 SHELLSBURG CABLEVISION, INC. 635      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.