Florida · Eastern Time
904 Area Code
Area code 904 is in Florida, serving Jacksonville and northeast Florida, including St. Augustine and Fernandina Beach. It is in the Eastern Time zone. It shares its territory with overlay code 324, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 904 area code?
904 is a Florida area code covering Jacksonville and northeast Florida, including St. Augustine and Fernandina Beach. In the wider directory it sits in the South region.
Cities in the 904 area code
- Jacksonville
- St. Augustine
- Orange Park
- Fleming Island
- Ponte Vedra Beach
- Jacksonville Beach
- Fernandina Beach
- Atlantic Beach
- Neptune Beach
- Middleburg
- Green Cove Springs
- Yulee
- Macclenny
- Callahan
Counties served by 904
Duval County, St. Johns County, Clay County, Nassau County and Baker County.
Time zone note: Most of Florida is Eastern; the western Panhandle (around Pensacola) is Central.
904 overlay codes and dialing
The 904 territory is covered by an overlay of 2 area codes: 324, 904. All of them serve the same geographic area, and the original code is 904. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 904 area code
904 went into service on July 11, 1965. It serves Jacksonville and the surrounding part of Florida, and today shares its territory with overlay code 324. For how codes are created, split, and overlaid, see how area codes work.
Is 904 a scam or spam risk?
904 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 904 number on your screen is no guarantee the caller is in Jacksonville, FL or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Florida area codes
Explore more
See every code in Florida, compare codes across the South region, or view all Eastern Time codes. You can also browse the 9XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
904 area code FAQ
Where is the 904 area code?
The 904 area code is in Florida, covering Jacksonville and northeast Florida, including St. Augustine and Fernandina Beach, in the South region.
What cities are in the 904 area code?
Cities in the 904 area code include Jacksonville, St. Augustine, Orange Park, Fleming Island, Ponte Vedra Beach, Jacksonville Beach, Fernandina Beach, Atlantic Beach, Neptune Beach and Middleburg.
What time zone is 904 in?
904 is in the Eastern Time zone. Most of Florida is Eastern; the western Panhandle (around Pensacola) is Central.
What is the overlay for the 904 area code?
904 shares its territory with 324. Both codes (324, 904) serve the same area, so 10-digit dialing is required for every call.
When did the 904 area code start?
904 went into service on July 11, 1965.
Do I have to dial 10 digits for 904?
Yes. Because 904 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 904 a toll-free or premium code?
No. 904 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.