Area code 301 covers western and southern Maryland, including suburbs of Washington, D.C. It was one of the original area codes created in 1947 and is now overlaid with 240. The historic town of Frederick lies within this area, known for its charming downtown, Civil War heritage sites, and growing arts scene. Residents enjoy a blend of colonial architecture and modern convenience, with local dining favorites and cultural venues like the Weinberg Center for the Arts contributing to Frederick's appeal.