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.
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Switch: DRHMNCXC47F

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
919-470 A Durham NC 4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-471 A Durham NC 4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-477 A Durham NC 4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-479 A Durham NC 4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-620 A Durham NC 4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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