Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
319-539 A CDRRIADTKMD  221F ONVOY, LLC - IA 635      
319-539 3   221F ONVOY, LLC - IA 635   2022-02-06   
319-648 A RVSDIAXOPS0  1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 635      
319-648 0   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 635      
319-648 1   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 635      
319-648 2   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 635      
319-648 3   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 635      
319-648 4   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 635      
319-648 5   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 635      
319-648 6   593K MCC TELEPHONY LLC 635   2010-04-15   
319-648 7   508J CENTURYLINK COMMUNICATIONS, LLC 635   2017-06-15   
319-648 8   544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 635   2018-05-14   
319-648 9   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 635      

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

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