Area code 516 serves Nassau County on Long Island, New York, including cities like Hempstead, Garden City, and Long Beach. Established in 1951 as a split from the 914 area code, it originally covered all of Long Island until 1999, when Suffolk County was assigned area code 631. The 516 region includes a mix of suburban neighborhoods, corporate headquarters, and coastal towns, with strong transportation links to New York City. Known for its affluence, excellent schools, and family-friendly communities, 516 is a highly desirable and recognizable area code. It remains a standalone code, widely used in business, media, and local identity across Long Island’s western half.