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.

Coulter, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
641-717 A DESMIADTFMD  221F ONVOY, LLC - IA 632      
641-717 1 DESMIADTFMD  221F ONVOY, LLC - IA 632   2020-04-01   
641-717 4 DESMIADTFMD  221F ONVOY, LLC - IA 632   2021-04-16   
641-717 5 DESMIADTFMD  221F ONVOY, LLC - IA 632   2021-04-16   
641-717 6 DESMIADTX1X  624H ONVOY SPECTRUM, LLC 632   2021-07-17   
641-866 A LTMRIAXODS0  1127 FRONTIER COMMUNICATIONS OF IOWA, INC. 632      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.