Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

NXX: 679

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-679 A Ooltewah TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472      
423-679 1 Ooltewah TN CHTGTNNSXMZ  624H ONVOY SPECTRUM, LLC 472   2023-06-17   
423-679 3 Ooltewah TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-07-11   
423-679 4 Ooltewah TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2021-07-11   
423-679 5 Ooltewah TN CHTGTN1212Z  490J DISH WIRELESS, LLC 472   2024-03-31   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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