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# The 904 Area Code

The 904 area code serves northeastern Florida, primarily covering the Jacksonville metropolitan area and surrounding regions. Established in 1957 as one of the original area codes created under the North American Numbering Plan, the 904 code has remained a defining telecommunications identifier for this region for over six decades. It encompasses Jacksonville, the largest city by area in the contiguous United States, along with nearby communities such as St. Augustine, Orange Park, and Fernandina Beach. The area code covers approximately 5,000 square miles and serves a diverse population ranging from urban residents to those in coastal and rural communities.

The North American Numbering Plan (NANP) is a standardized telephone numbering system that organizes phone numbers across the United States, Canada, and several Caribbean nations. Under this system, area codes are three-digit designations that form the first part of a ten-digit phone number, allowing telecommunications networks to route calls efficiently to the correct geographic region. Area codes like 904 are assigned by the North American Numbering Plan Administrator (NANPA) and are regulated by the Federal Communications Commission (FCC). As telecommunications demand in northeastern Florida grew, an additional overlay area code, 386, was introduced in 2001 to serve some of the same geographic territory, allowing the region to accommodate more phone numbers while maintaining the original 904 code's continued use.