Cities in area code 904

19 localities · NANPA data, current as of July 28, 2026.

Which places use area code 904? 19 rate centers in Florida, the biggest being Jacksonville, Saint Johns, Fernandina Beach. Data below is NANPA's official prefix-to-rate-center mapping.

Ranked by active prefixes, the code's territory runs through Jacksonville, Saint Johns, Fernandina Beach, Orange Park, Jacksonville Beach, Middleburg, Ponte Vedra Beach and Starke, and 10 smaller communities down to single-prefix localities.

17 of the localities fall within FCC top-100 metropolitan statistical areas; the rest are smaller communities.

7 of these localities are also reachable through other area codes — overlay territory where the same place answers to several codes.

All of the code's territory keeps Eastern time.

Remember that people keep numbers when they relocate, so a 904 number is a where-it-was-issued fact, not a where-they-are fact.

FAQ

What is the biggest city in area code 904?

Jacksonville holds the most active prefixes (482), making it the code's largest numbering locality.

How many places does 904 cover?

19 rate centers in Florida hold active 904 prefixes, from Jacksonville down to communities with a single prefix.

Does a 904 number guarantee the caller lives in one of these places?

No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.