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]

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-993 A Chattanooga TN   321J HD CARRIER LLC 472   2026-01-22   
423-994 A Chattanooga TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-995 A Johnson City TN   321J HD CARRIER LLC 956   2026-01-22   
423-996 A Charleston TN   7473 POWERTEL ATLANTA LICENSES, INC. 472   2025-11-22   
423-997 A Elizabethton TN   124F BANDWIDTH.COM CLEC, LLC - TN 956   2025-10-04   
423-998 A Jellico TN KNVOTNTN0MD  939H COMMIO, LLC 474      
423-999 A Athens TN KNVLTNWHX6X  7476 POWERTEL NASHVILLE LICENSES, INC. 474      

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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