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: RLGHNCMODS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
919-294 A Durham NC 8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 426      
919-334 A Raleigh NC 8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 426      
919-335 A Apex NC 8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 426      
919-336 A Cary (Research Triangle Park) NC 8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 426      
919-337 A Cary NC 8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 426      
919-357 A Chapel Hill NC 8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 426      
919-907 A Durham NC 8389 TELEPORT COMMUNICATIONS AMERICA, LLC - NC 426      

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

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