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.

OCN: 845C INTRADO COMMUNICATIONS, LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
423-318 4 Morristown TN   474   2026-10-23   
423-395 6 Athens TN   474   2026-11-10   
423-699 9 Cleveland TN   472   2026-11-06   
423-978 7 Chattanooga TN   472   2026-10-09   
615-912 7 Hendersonville TN   470   2026-11-01   
629-343 6 Goodlettsville TN   470   2026-10-29   
629-344 2 Murfreesboro TN   470   2026-10-09   
629-346 7 Smyrna TN   470   2026-10-29   
731-262 3 Paris TN   468   2026-10-29   
731-465 7 Jackson TN   468   2026-10-16   
865-275 A Oak Ridge TN KNVLTNMAYFX  474      
865-275 9 Oak Ridge TN KNVLTNMAYFX  474      
865-485 7 Knoxville TN   474   2026-10-05   
865-515 0 Oak Ridge TN   474   2026-09-15   
865-969 7 Maryville TN   474   2026-10-16   
901-506 A Memphis TN MMPHTNMAYHX  468      
901-760 4 Collierville TN   468   2026-10-23   
931-480 7 Clarksville TN   470   2026-10-09   
931-483 7 Columbia TN   470   2026-11-13   
931-773 4 Shelbyville TN   470   2026-11-01   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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