Area code 703 serves northern Virginia, including Arlington, Alexandria, Fairfax, and parts of the D.C. metro area. It was one of the original area codes introduced in 1947 and has since been overlaid by 571 to meet growing demand. The region is a hub for federal government agencies, defense contractors, and affluent suburban communities. Located just across the Potomac River from Washington, D.C., area code 703 is often associated with political influence, high-level consulting, and national security. Its long history and close ties to the capital make 703 a prominent and prestigious code. Ten-digit dialing is required in the area.