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: 663

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-663 A Huntsville TN HNVITNXARS0  0565 HIGHLAND TEL. COOP, INC. 474      
423-663 0 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      
423-663 1 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      
423-663 2 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      
423-663 3 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      
423-663 4 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      
423-663 5 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      
423-663 6 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      
423-663 7 Huntsville TN   6278 UNITED STATES CELLULAR - TN 474      
423-663 8 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      
423-663 9 Huntsville TN   0565 HIGHLAND TEL. COOP, INC. 474      

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

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