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: 924

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-924 A Johnson City TN   276F PEERLESS NETWORK OF TENNESSEE, LLC - TN 956   2025-05-04   
423-924 0 Johnson City TN   276F PEERLESS NETWORK OF TENNESSEE, LLC - TN 956   2025-05-04   
423-924 1 Johnson City TN   6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2025-10-20   
423-924 4 Johnson City TN   490J BOOST SUBSCRIBERCO L.L.C. 956   2025-09-25   
423-924 5 Johnson City TN   490J BOOST SUBSCRIBERCO L.L.C. 956   2025-08-21   

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

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