Area code 854 is found in the US state of South Carolina. Area codes 843 and 854. Area codes 843 and 854 serve the eastern third of South Carolina. They cover the Grand Strand, the Lowcountry, the Pee Dee, and the Sandhills. Major cities in the region include Myrtle Beach, Charleston, Beaufort, Hilton Head Island and Florence. Area code 854 was first put in service October 19, 2015. Currently, the largest city it serves is Charleston, SC, and it overlaps coverage areas with area code 843. Phone numbers in the 854 area code can be found in 4 cities or locations.