Area code 904 covers a region in northeastern Florida, including cities like Jacksonville, St. Augustine, and Fernandina Beach. Over time, as the population and demand for phone numbers grew, the coverage area of 904 expanded. Initially, it served only Jacksonville and surrounding areas, but over the years, its reach extended to neighboring cities and rural areas. For more detailed information about the history and changes in area code 904, refer to this source. Due to the continued growth in Florida, area codes like 904 have been divided or supplemented with overlay codes to accommodate the increasing need for phone numbers. |