Local Calling Guide

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Search area code/prefix (NPA/NXX)
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NPA: 712 [Rate centres in NPA 712] [Dial plan for NPA 712]

NXX: 399

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-399 A Malvern IA MLVRIACORS1  9631 QWEST CORPORATION 644      
712-399 0 Malvern IA   221F ONVOY, LLC - IA 644   2021-04-23   
712-399 1 Malvern IA   221F ONVOY, LLC - IA 644   2021-04-23   
712-399 2 Malvern IA   9631 QWEST CORPORATION 644   2020-10-23   
712-399 3 Malvern IA   221F ONVOY, LLC - IA 644   2021-05-10   
712-399 4 Malvern IA   156C BTC, INC. - IA 644   2021-05-15   
712-399 5 Malvern IA   9877 LEVEL 3 COMMUNICATIONS, LLC - IA 644   2022-03-19   
712-399 6 Malvern IA   624H ONVOY SPECTRUM, LLC 644   2024-12-19   
712-399 8 Malvern IA   939H COMMIO, LLC 644   2022-11-06   

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

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