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.

NPA: 919 [Rate centres in NPA 919] [Dial plan for NPA 919]

NXX: 321

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
919-321 A Durham NC RLGHNCJV4MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 426      
919-321 0 Durham NC RLGHNCJV4MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 426      
919-321 1 Durham NC RLGHNCJV4MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 426      
919-321 2 Durham NC RLGHNCJV4MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 426   2005-05-28   
919-321 3 Durham NC RLGHNCJV4MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 426   2005-05-28   
919-321 4 Durham NC RLGHNCJV4MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 426      
919-321 5 Durham NC RLGJNCBZ2MD  8645 SUNCOM DBA T-MOBILE USA 426   2011-08-02   
919-321 6 Durham NC RLGHNCJV4MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 426      
919-321 7 Durham NC DRHMNCXMX1Y  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 426   2011-10-12   
919-321 8 Durham NC RLGHNCJV4MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 426      
919-321 9 Durham NC DRHMNCXMDMD  638E ONVOY, LLC - NC 426   2022-10-17   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.