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: 743 [Rate centres in NPA 743] [Dial plan for NPA 743]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
743-257 A Winston-Salem NC GNBONCPHX9X  732J NUSO, LLC 424      
743-257 0 Winston-Salem NC GNBONCEU78Z  624H ONVOY SPECTRUM, LLC 424      
743-257 1 Winston-Salem NC GNBONCPHX9X  732J NUSO, LLC 424      
743-257 2 Winston-Salem NC GNBONCEU78Z  624H ONVOY SPECTRUM, LLC 424      
743-257 3 Winston-Salem NC GNBONCEU78Z  624H ONVOY SPECTRUM, LLC 424      
743-257 4 Winston-Salem NC GNBONCEU78Z  624H ONVOY SPECTRUM, LLC 424      
743-257 5 Winston-Salem NC GNBONCEU78Z  624H ONVOY SPECTRUM, LLC 424      
743-257 6 Winston-Salem NC GNBONCCKX9X  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 424      
743-257 7 Winston-Salem NC GNBONCEU45Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 424      
743-257 8 Winston-Salem NC GNBONCEU45Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 424      
743-257 9 Winston-Salem NC GNBONCEU45Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 424      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.