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: KNVLTNMAY5X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
423-372 6 Jellico TN 073H TELNYX LLC 474   2021-03-08   
423-456 A La Follette TN 073H TELNYX LLC 474      
423-456 0 La Follette TN 073H TELNYX LLC 474   2021-07-25   
423-456 6 La Follette TN 073H TELNYX LLC 474   2017-03-30   
423-546 1 Bulls Gap TN 073H TELNYX LLC 474   2021-03-22   
423-604 1 Etowah TN 073H TELNYX LLC 474   2021-03-21   
423-934 0 Surgoinsville TN 073H TELNYX LLC 474   2021-05-14   
865-276 0 Oak Ridge TN 073H TELNYX LLC 474   2023-03-19   
865-298 9 Oak Ridge TN 073H TELNYX LLC 474   2021-03-08   
865-339 1 Powell TN 073H TELNYX LLC 474   2021-01-23   
865-390 8 Lenoir City TN 073H TELNYX LLC 474   2021-03-08   
865-855 1 Clinton TN 073H TELNYX LLC 474   2021-07-15   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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