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: JHCYTNXCXPX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
276-270 A Konnarock VA 138E ONVOY, LLC - VA 956      
276-273 A Morrison City VA 138E ONVOY, LLC - VA 956      
276-300 A Abingdon VA 138E ONVOY, LLC - VA 956      
276-319 A Abingdon VA 138E ONVOY, LLC - VA 956   2024-03-30   
276-600 A Damascus VA 138E ONVOY, LLC - VA 956      
276-900 A Glade Spring VA 138E ONVOY, LLC - VA 956      
423-427 A Johnson City TN 525E ONVOY, LLC - TN 956      
423-560 A Erwin TN 525E ONVOY, LLC - TN 956      
423-662 A Blountville TN 525E ONVOY, LLC - TN 956      
423-666 A Elizabethton TN 525E ONVOY, LLC - TN 956      
423-678 A Roan Mountain TN 525E ONVOY, LLC - TN 956      
423-766 A Limestone TN 525E ONVOY, LLC - TN 956      
423-770 A Church Hill TN 525E ONVOY, LLC - TN 956      
423-786 A Bluff City TN 525E ONVOY, LLC - TN 956      
423-820 A Greeneville TN 525E ONVOY, LLC - TN 956      
423-824 A Erwin TN 525E ONVOY, LLC - TN 956      
423-830 A Kingsport TN 525E ONVOY, LLC - TN 956      
423-840 A Butler TN 525E ONVOY, LLC - TN 956      
423-850 A Jonesboro TN 525E ONVOY, LLC - TN 956      
423-858 A Blountville TN 525E ONVOY, LLC - TN 956      
423-868 A Mosheim TN 525E ONVOY, LLC - TN 956      
423-880 A Johnson City TN 525E ONVOY, LLC - TN 956      
423-900 A Johnson City TN 525E ONVOY, LLC - TN 956      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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