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: 343

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-343 A Kingsport TN KGPTTNXCRS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-343 0 Kingsport TN KGPTTNXCRS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-343 1 Kingsport TN KGPTTNXCRS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-343 2 Kingsport TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2007-03-22   
423-343 3 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956   2007-04-13   
423-343 4 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956   2003-02-17   
423-343 5 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956   2005-09-16   
423-343 6 Kingsport TN JHCYTNXCX2Y  5562 METROPCS, INC. 956   2007-05-08   
423-343 7 Kingsport TN KGPTTNXCRS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-343 8 Kingsport TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956   2007-05-23   
423-343 9 Kingsport TN BUVLTNAXPS1  704C CHARTER FIBERLINK-TENNESSEE, LLC - TN 956   2008-04-18   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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