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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OCN: 2757 CENTURYLINK COMMUNICATIONS LLC - TN

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
423-664 A Chattanooga TN CHTGTN78DS0  472      
423-664 0 Chattanooga TN CHTGTN78DS0  472      
423-664 1 Chattanooga TN CHTGTN78DS0  472      
423-664 4 Chattanooga TN CHTGTN78DS0  472      
423-664 5 Chattanooga TN CHTGTN78DS0  472      
423-664 9 Chattanooga TN CHTGTN78DS0  472      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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