Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
319-528 A DNMKIAXORS0  1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 634      
319-528 0 DNMKIAXORP0  1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 634      
319-528 1 DNMKIAXORS0  1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 634      
319-528 2 MNPLIAXCJMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 634   2017-03-15   
319-528 3 DVNPIAEA9MD  9877 LEVEL 3 COMMUNICATIONS, LLC - IA 634   2022-02-02   
319-528 4 DNMKIAXORS0  1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 634      
319-528 5 DVNPIADTGMD  221F ONVOY, LLC - IA 634   2020-06-27   
319-528 6 DNMKIAXORS0  1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 634      
319-528 7 DVNPIAEAGMD  508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-05   
319-528 8 MNPLIAXCJMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 634   2015-05-29   
319-528 9 MNPLIAXCJMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 634   2019-07-02   
319-742 A DVNPIADTXZX  516J TON80 COMMUNICATIONS, LLC 634      
319-742 2 MNPLIAXCGMD  624H ONVOY SPECTRUM, LLC 634   2024-12-19   
319-742 6 DVNPIADTXZX  516J TON80 COMMUNICATIONS, LLC 634   2022-04-25   

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

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