Area code 305 serves southeastern Florida, most notably Miami and the Florida Keys. Established in 1947, it was Florida’s original code and is now overlaid by 786. Miami is a vibrant, multicultural city known for its Art Deco architecture, beaches, Cuban influences, and international nightlife. From the bustling streets of Little Havana to the serenity of Biscayne Bay, this area code captures one of the most iconic urban regions in the U.S.