Local Calling Guide

Area code/prefix search

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

NXX: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-678 A Charter Oak IA CHROIAXORS6  1127 FRONTIER COMMUNICATIONS OF IOWA, INC. 644      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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