Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   
641-717 7   145J TERRA NOVA TELECOM INC. 632   2025-05-17   
641-866 A LTMRIAXODS0  1127 FRONTIER COMMUNICATIONS OF IOWA, INC. 632      

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

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