Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

NXX: 960

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-960 A Chattanooga TN   276F PEERLESS NETWORK OF TENNESSEE, LLC - TN 472   2025-04-20   
423-960 0 Chattanooga TN   276F PEERLESS NETWORK OF TENNESSEE, LLC - TN 472   2025-04-20   
423-960 1 Chattanooga TN   124F BANDWIDTH.COM CLEC, LLC - TN 472   2025-05-24   
423-960 3 Chattanooga TN   490J DISH WIRELESS, LLC 472   2025-10-16   
423-960 4 Chattanooga TN   490J DISH WIRELESS, LLC 472   2025-08-28   
423-960 6 Chattanooga TN   114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 472   2025-08-22   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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