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: JHCYTNXCYZZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
423-220 A Erwin TN 829J PAETEC ITEL, LLC 956   2024-12-07   
423-673 A Johnson City TN 829J PAETEC ITEL, LLC 956   2024-12-07   
423-758 A Bristol TN 829J PAETEC ITEL, LLC 956   2024-12-07   
423-782 A Kingsport TN 829J PAETEC ITEL, LLC 956   2024-12-07   
423-794 A Johnson City TN 829J PAETEC ITEL, LLC 956   2024-12-07   

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

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