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.

Durham (Research Triangle Park), NC

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
919-248 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-254 A DRHMNCXFRS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-315 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 0 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 1 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 2 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 3 DRHMNCXMPS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 4 MRVLNCCNCMD  6324 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 426   2008-06-09   
919-406 5 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 6 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 7 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 8 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-406 9 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-472 A DRHMNCXHDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 0 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 1 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 2 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 3 RLGHNCJVFMD  7555 LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 426      
919-485 4 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 5 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 6 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 7 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 8 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-485 9 MRVLNCCNCMD  6324 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 426   2009-06-28   
919-486 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-517 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-541 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-547 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-549 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-558 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-685 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-685 0 RLGJNCBZ2MD  8645 SUNCOM DBA T-MOBILE USA 426   2007-01-03   
919-685 1 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-685 2 RLGJNCBZ2MD  8645 SUNCOM DBA T-MOBILE USA 426   2007-01-03   
919-685 3 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-685 4 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-685 5 RLGJNCBZ2MD  8645 SUNCOM DBA T-MOBILE USA 426   2007-01-03   
919-685 6 RLGJNCBZ2MD  8645 SUNCOM DBA T-MOBILE USA 426   2007-04-11   
919-685 7 RLGJNCBZ2MD  8645 SUNCOM DBA T-MOBILE USA 426   2006-11-09   
919-685 8 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-685 9 DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-905 A DRHMNCXHDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-990 A DRHMNCXEDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-991 A DRHMNCXHDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-992 A DRHMNCXHDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      
919-993 A DRHMNCXHDS0  4334 FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 426      

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.