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: 927

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-927 A Morristown TN KNVNTNEC6MD  516J TON80 COMMUNICATIONS, LLC 474      
423-927 0 Morristown TN KNVNTNEC2MD  939H COMMIO, LLC 474   2022-08-12   
423-927 1 Morristown TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2022-09-29   
423-927 2 Morristown TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2022-09-29   
423-927 3 Morristown TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2022-09-29   
423-927 4 Morristown TN   124F BANDWIDTH.COM CLEC, LLC - TN 474   2026-11-07   
423-927 6 Morristown TN   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 474   2026-10-01   
423-927 7 Morristown TN KNVNTNEC6MD  516J TON80 COMMUNICATIONS, LLC 474   2022-05-04   
423-927 8 Morristown TN KNVLTNMA56Z  124F BANDWIDTH.COM CLEC, LLC - TN 474   2026-06-06   
423-927 9 Morristown TN   124F BANDWIDTH.COM CLEC, LLC - TN 474   2026-08-08   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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