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: 336 [Rate centres in NPA 336] [Dial plan for NPA 336]

NXX: 478

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
336-478 A Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424   2025-02-12   
336-478 0 Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424      
336-478 1 Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424      
336-478 2 Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424      
336-478 3 Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424      
336-478 4 Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424      
336-478 5 Greensboro NC GNBONCEU65Z  8645 SUNCOM DBA T-MOBILE USA 424   2006-08-20   
336-478 6 Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424      
336-478 7 Greensboro NC GNBONCEU65Z  8645 SUNCOM DBA T-MOBILE USA 424   2010-11-07   
336-478 8 Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424      
336-478 9 Greensboro NC GNBONCEU02Z  829J PAETEC ITEL, LLC 424      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.