Area code 609 serves southern New Jersey, including Trenton, Atlantic City, and Princeton. Established in 1958 from a split with 201, it covers diverse areas from the state capital to the Jersey Shore and academic hubs. Ten-digit dialing is required due to overlays. The region combines political, recreational, and educational importance, with 609 symbolizing New Jersey’s cultural and economic diversity. It is frequently used in local branding and is well-known for its ties to Atlantic City’s gaming industry and Princeton’s intellectual prestige.