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: JHCYTNXCXAY

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
423-873 0 Stoney Creek TN 073H TELNYX LLC 956   2021-01-23   
423-896 9 Hampton TN 073H TELNYX LLC 956   2021-01-23   
423-897 4 Fall Branch TN 073H TELNYX LLC 956   2021-01-23   
423-922 0 Baileyton TN 073H TELNYX LLC 956   2021-01-17   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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