Local Calling Guide

Area code/prefix search

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NPA: 678 [Rate centres in NPA 678] [Dial plan for NPA 678]

NXX: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
678-428 A Atlanta GA ATLNGATLG00  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 438      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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