Area code 743 is found in the US state of North Carolina. Area codes 336 and 743 are NANPA area codes which cover most of north-western North Carolina and parts of central North Carolina, mainly the Piedmont Triad region and the northern Foothills and northern Mountain regions. It was created out of area code 910 on December 15, 1997. Area code 743 was first put in service May 23, 2016. Currently, the largest city it serves is Greensboro, NC, and it overlaps coverage areas with area code 336. Phone numbers in the 743 area code can be found in 3 cities or locations.