843 Area Code: Charleston, South Carolina

Coastal South Carolina is served by the 843 area code, with Charleston as the primary city. Charleston sits on a peninsula between the Ashley and Cooper rivers where they reach Charleston Harbor, on a stretch of coast that has long anchored the city's working profile — a deepwater port, a substantial tourism economy built around the historic district's preserved colonial-era and antebellum architecture, and a more recent reorientation toward aerospace (Boeing's South Carolina assembly plant), automotive manufacturing, and technology employment. The 843 footprint extends through Myrtle Beach, Hilton Head Island, Beaufort, and the surrounding South Carolina coast.

In records the directory has compiled for 843 numbers, other South Carolina cities — Columbia and Greenville — recur frequently. Neither is inside the 843 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across South Carolina and addresses linked across multiple cities. The directory currently documents 637 distinct prefixes within 843 in detail, a working subset of the prefix population the code carries.

Charleston's median household income runs above the US figure, supported by the city's growing concentration of aerospace, technology, and tourism-related employment. Home values come in well above the national median, in line with the city's strong tourism-and-amenity-driven housing demand and the broader coastal Southeast pricing pattern. The city's median age sits close to the US reading, and population places Charleston as one of the larger cities in South Carolina — substantial enough to anchor a regional economy organized around the port, tourism, and the surrounding coastal Lowcountry.