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: 712 [Rate centres in NPA 712] [Dial plan for NPA 712]

NXX: 280

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-280 A Harlan IA HRLNIAXTPS0  1170 WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 644      
712-280 0 Harlan IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2023-10-15   
712-280 1 Harlan IA OMAHNENWXPX  221F ONVOY, LLC - IA 644   2023-10-15   
712-280 8 Harlan IA OMAHNENWXMX  6701 AERIAL COMMUNICATIONS, INC. 644   2024-09-05   
712-280 9 Harlan IA HRLNIAXTPS0  1170 WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 644   2018-03-17   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.