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.
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Diagonal, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
641-273 A KNVLIAXCPMD  624H ONVOY SPECTRUM, LLC 632   2024-07-02   
641-273 0   624H ONVOY SPECTRUM, LLC 632   2024-07-02   
641-734 A DGNLIAXORS0  1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 632      
641-734 0   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 632      
641-734 1   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 632      
641-734 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2021-08-20   
641-734 3   544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 632   2018-05-14   
641-734 4   221F ONVOY, LLC - IA 632   2019-11-29   
641-734 5   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 632      
641-734 6   221F ONVOY, LLC - IA 632   2021-04-22   
641-734 7   508J CENTURYLINK COMMUNICATIONS, LLC 632   2017-03-21   
641-734 8   221F ONVOY, LLC - IA 632   2021-04-22   
641-734 9   1178 WINDSTREAM IOWA COMMUNICATIONS, INC. 632      

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

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