Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Delmar, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
563-574 A WTLDIAXODS0  4245 F&B COMMUNICATIONS, INC. - IA 634      
563-674 A DLMRIAXORS0  1170 WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 634      
563-674 1   1170 WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 634      
563-674 2   624H ONVOY SPECTRUM, LLC 634   2024-12-19   
563-674 3   221F ONVOY, LLC - IA 634   2020-10-06   
563-674 4   1170 WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 634      
563-674 6   221F ONVOY, LLC - IA 634   2020-06-27   
563-674 7   508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-05   
563-674 8   221F ONVOY, LLC - IA 634   2021-03-14   

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

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