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.

Minden, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
712-407 A AVOCIAXO2MD  774B WALNUT TELEPHONE COMPANY, INC. - IA 644      
712-407 1   624H ONVOY SPECTRUM, LLC 644   2024-06-07   
712-407 2   774B WALNUT TELEPHONE COMPANY, INC. - IA 644   2004-07-16   
712-407 4   221F ONVOY, LLC - IA 644   2021-05-21   
712-407 7   221F ONVOY, LLC - IA 644   2021-10-30   
712-483 A MINDIAXORP0  1170 WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 644      
712-483 1   1170 WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 644      
712-483 2   1170 WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 644      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.