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.

Thurman, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
712-628 A THRMIAXPRS0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-628 1   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-628 2   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-628 3   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-628 4   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      
712-628 5   221F ONVOY, LLC - IA 644   2021-04-02   
712-628 6   221F ONVOY, LLC - IA 644   2019-12-01   
712-628 7   221F ONVOY, LLC - IA 644   2021-04-02   
712-628 9   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 644      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.