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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: CHTGTNNSX8X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
423-294 A Chattanooga TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-299 A Benton TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-443 A Chattanooga TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-454 A Decatur TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-665 A Charleston TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-702 A Chattanooga TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-761 A Copper Basin TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-799 A Spring City TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-809 A Pikeville TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-852 A Dunlap TN 4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
706-956 A Rossville GA 6116 LEVEL 3 COMMUNICATIONS, LLC - GA 472      

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

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