The area code 336 is located in North Carolina, USA, and covers most of north-central and northwestern North Carolina, including the Piedmont Triad region and portions of the northern Foothills and northern Mountains. It was split off from area code 910 on December 15, 1997, and has a single overlay (743) that serves the same area. The 336/743 overlay complex was activated on October 24, 2015, and requires 10-digit dialing for local calls, although no long-distance charges are applied within the 336 territory. Some of the main locations covered by the 336 area code include Greensboro, Winston-Salem, and High Point.