Local Calling Guide

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NPA: 712 [Rate centres in NPA 712] [Dial plan for NPA 712]

NXX: 424

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-424 A Cylinder IA CYLNIAXORP0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-424 0 Cylinder IA   624H ONVOY SPECTRUM, LLC 630   2024-03-17   
712-424 1 Cylinder IA   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-424 2 Cylinder IA   221F ONVOY, LLC - IA 630   2021-05-05   
712-424 3 Cylinder IA   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-424 4 Cylinder IA   221F ONVOY, LLC - IA 630   2021-09-04   
712-424 7 Cylinder IA   508J CENTURYLINK COMMUNICATIONS, LLC 630   2016-12-23   
712-424 9 Cylinder IA   1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      

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

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