Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 308 [Rate centres in NPA 308] [Dial plan for NPA 308]

NXX: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
308-400 A Ord NE GDISNEASGMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 646      
308-400 0 Ord NE   549E ONVOY, LLC - NE 646   2026-01-12   
308-400 1 Ord NE   3233 LEVEL 3 COMMUNICATIONS, LLC - NE 646   2023-03-06   
308-400 4 Ord NE   549E ONVOY, LLC - NE 646   2021-04-02   
308-400 5 Ord NE   549E ONVOY, LLC - NE 646   2021-04-02   
308-400 9 Ord NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 646   2020-11-29   

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

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