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: 372

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-372 A Jellico TN KNVLTNMANMD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 474      
423-372 0 Jellico TN KNVLTNMANMD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 474      
423-372 2 Jellico TN KNVLTNMAYCY  793K TWC IP ENABLED SERVICES, LLC 474   2023-01-12   
423-372 6 Jellico TN KNVLTNMAY5X  073H TELNYX LLC 474   2021-03-08   
423-372 8 Jellico TN KNVLTNMAY8X  624H ONVOY SPECTRUM, LLC 474   2023-06-17   

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

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