The 904 area code is strongly associated with Jacksonville and the surrounding communities of Northeast Florida. It appears on residential, business, and mobile phone numbers across this part of the state. Understanding the 904 Area Code Location can help you identify where a number is associated with, check the local time before making a call, or understand Florida’s changing telephone numbering system.
The area now shares its geographic territory with the newer 324 area code. Even so, existing 904 numbers remain active, making it one of the most recognizable telephone codes in Northeast Florida.
Where Is the 904 Area Code Location?
The 904 Area Code Location is in Northeast Florida, United States. Jacksonville is the largest and best-known city within the region, but the code is not limited to Jacksonville itself.
The 904 numbering plan area covers all or most of several Northeast Florida counties, including Duval, Nassau, Baker, Bradford, Clay, St. Johns, and Union counties. Its territory therefore stretches beyond Jacksonville into coastal communities, suburbs, and smaller inland areas.
The code is part of the North American Numbering Plan, the telephone numbering framework used across the United States and other participating countries and territories.
What Cities Use the 904 Area Code?
Jacksonville is at the center of the 904 Area Code Location, but many surrounding places also use 904 numbers. Some notable communities within the numbering area include:
- Jacksonville
- Jacksonville Beach
- Fernandina Beach
- Orange Park
- Middleburg
- Yulee
- Baldwin
- Callahan
- Green Cove Springs
- Hilliard
- Macclenny
- Ponte Vedra Beach
- St. Augustine
- Starke
This list is not exhaustive. The numbering area includes additional smaller communities and telephone rate centers across Northeast Florida.
For someone trying to identify an unfamiliar call, this geographic range matters. A 904 number may be connected with Jacksonville, but the area code alone does not prove that the caller is physically located in Jacksonville.
Which State Does Area Code 904 Belong To?
The 904 Area Code Location is entirely associated with Florida. More specifically, it serves the northeastern portion of the state rather than South Florida, Central Florida, or most of the Panhandle.
Jacksonville’s importance helps explain why many people informally think of 904 as the “Jacksonville area code.” However, its actual coverage is broader and includes several counties and communities outside the city.
Florida has numerous area codes because of its large population and continuing demand for telephone numbers. As available numbers within an area code become limited, regulators can introduce additional codes through geographic splits or overlays.
What Time Zone Is the 904 Area Code In?
The 904 Area Code Location follows the Eastern Time Zone.
During standard time, the region observes Eastern Standard Time (EST), which is UTC−5. During daylight saving time, clocks move forward and the area observes Eastern Daylight Time (EDT), or UTC−4.
This is particularly useful to know when calling Northeast Florida from another part of the United States or from overseas. For example, Jacksonville follows the same general clock time as cities such as New York and Washington, D.C.
Because daylight saving time affects the offset during the year, international callers should check the current local time rather than relying on a fixed UTC difference.
How the 904 and 324 Area Codes Work Together
One of the most important recent changes affecting the 904 Area Code Location is the introduction of area code 324.
The Florida Public Service Commission approved 324 as an overlay for the existing 904 numbering plan area. An overlay means that two area codes serve the same geographic territory rather than dividing the region into separate sections.
The 324 overlay went into service in 2024. New customers, additional telephone lines, and some customers changing service can receive a 324 number instead of a 904 number.
This did not require existing 904 customers to change their telephone numbers. A person or business with a 904 number can continue using it.
As a result, two people living or operating businesses in the same Northeast Florida community may have different area codes—one could have 904 while another has 324.
Do You Need 10-Digit Dialing in the 904 Area?
Yes. The overlay changed how local calls are dialed within the 904 Area Code Location.
Mandatory 10-digit dialing began on January 29, 2024. Callers use the three-digit area code plus the seven-digit telephone number for local calls.
For example, instead of entering only a seven-digit local number, callers should use:
904-XXX-XXXX
A 324 number follows the same format:
324-XXX-XXXX
The introduction of 324 did not change which calls are considered local simply because a different area code is involved. It also did not require current 904 customers to obtain new numbers.
Can a 904 Number Tell You Exactly Where Someone Is?
The 904 Area Code Location provides a useful geographic clue, but it cannot reliably reveal a caller’s exact physical location.
Area codes originally had a stronger relationship with fixed geographic telephone lines. Modern mobile services and number portability make that connection less precise. Someone may keep a 904 mobile number after moving elsewhere.
Caller ID information can also be manipulated through spoofing. Scammers sometimes display a familiar or local-looking area code in an attempt to encourage recipients to answer.
For that reason, you should not assume that an unknown caller is trustworthy simply because the number begins with 904. If the caller claims to represent a company, government agency, bank, or another organization, independently verify the contact details before sharing sensitive information.
Why the 904 Area Code Matters to Northeast Florida
The 904 Area Code Location has a particularly close connection with Jacksonville and Northeast Florida. Long-established residents, organizations, and businesses may still have 904 numbers even as new 324 numbers become more common.
The overlay allows the region to gain additional telephone-number capacity without forcing existing customers to change their numbers. It also means that area codes are no longer a way to distinguish different neighborhoods within the overlay territory.
For businesses, the practical lesson is simple: both 904 and 324 can represent the same Northeast Florida market.
Frequently Asked Questions
Where is area code 904 located?
The 904 Area Code Location is Northeast Florida. It includes Jacksonville and surrounding communities across all or most of Duval, Nassau, Baker, Bradford, Clay, St. Johns, and Union counties.
Is 904 a Jacksonville area code?
Yes. Jacksonville is the largest city served by 904, so the code is closely associated with the city. However, 904 also covers numerous other Northeast Florida communities, including Jacksonville Beach, Orange Park, Fernandina Beach, Middleburg, and Yulee.
What time zone does area code 904 use?
The 904 Area Code Location uses Eastern Time. It observes EST during standard time and EDT during daylight saving time.
Are 904 and 324 the same location?
Yes. Area code 324 is an overlay of 904, meaning both codes serve the same general geographic region in Northeast Florida. The addition of 324 did not remove or replace existing 904 numbers.
Do I have to dial the area code for a local 904 call?
Yes. Ten-digit dialing is required in the 904/324 overlay region. For a local 904 number, callers should dial the 904 area code followed by the seven-digit telephone number.
Does a 904 phone number mean the caller is currently in Florida?
Not necessarily. The 904 Area Code Location is geographically tied to Northeast Florida, but people can retain mobile numbers after moving. Caller ID can also be spoofed, so an area code should not be treated as proof of a caller’s current location or identity.
Conclusion
The 904 Area Code Location covers Jacksonville and a wider section of Northeast Florida, including communities across several surrounding counties. The region uses Eastern Time and now shares its numbering territory with the 324 overlay.
For residents and callers, the most important practical points are straightforward: existing 904 numbers remain valid, 324 numbers can serve the same communities, and local calls require 10-digit dialing. Knowing these details makes it easier to recognize Northeast Florida phone numbers while avoiding the assumption that an area code alone reveals a caller’s exact location or identity.
Read Also: 904 Area Code: Location, Cities, Time Zone and Phone Numbers
