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: 445

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-445 A Surgoinsville TN KNVLTNMA84Z  516C AT&T CORP. 474      
423-445 0 Surgoinsville TN   525E ONVOY, LLC - TN 474   2016-04-03   
423-445 1 Surgoinsville TN   525E ONVOY, LLC - TN 474   2016-04-03   
423-445 2 Surgoinsville TN   124F BANDWIDTH.COM CLEC, LLC - TN 474   2017-06-03   
423-445 3 Surgoinsville TN   7278 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 474   2017-01-16   
423-445 4 Surgoinsville TN   525E ONVOY, LLC - TN 474   2016-05-26   
423-445 5 Surgoinsville TN   516C AT&T CORP. 474   2011-11-02   
423-445 6 Surgoinsville TN   114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 474   2017-01-20   
423-445 7 Surgoinsville TN   525E ONVOY, LLC - TN 474   2018-03-31   
423-445 8 Surgoinsville TN   124F BANDWIDTH.COM CLEC, LLC - TN 474   2018-09-22   
423-445 9 Surgoinsville TN   624H ONVOY SPECTRUM, LLC 474   2023-06-17   

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

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