Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
712-487 A TRYNIAXORS4  1127 FRONTIER COMMUNICATIONS OF IOWA, INC. 644      
712-487 0   1127 FRONTIER COMMUNICATIONS OF IOWA, INC. 644      
712-487 1   444G AUREON COMMUNICATIONS, LLC 644   2013-10-07   
712-487 2   156C BTC, INC. - IA 644   2022-04-02   
712-487 3   1127 FRONTIER COMMUNICATIONS OF IOWA, INC. 644      
712-487 4   221F ONVOY, LLC - IA 644   2018-11-17   
712-487 5   221F ONVOY, LLC - IA 644   2021-11-17   
712-487 7   508J CENTURYLINK COMMUNICATIONS, LLC 644   2017-10-31   
712-487 8   221F ONVOY, LLC - IA 644   2021-06-11   
712-487 9   1127 FRONTIER COMMUNICATIONS OF IOWA, INC. 644      

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

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