A phone number beginning with 904 points to northeastern Florida, particularly the Jacksonville region and nearby communities. The 904 Area Code has long been associated with this part of the state, covering a mix of major urban areas, coastal communities, suburbs, and smaller towns.
For residents, businesses, travelers, or anyone trying to identify an unfamiliar caller, knowing the geographic coverage and dialing rules can be useful. The region has also undergone an important numbering change in recent years, with area code 324 introduced as an overlay to provide additional phone-number capacity.
Where Is the 904 Area Code Located?
The 904 Area Code is located in northeastern Florida. Jacksonville is the largest and most recognizable city associated with it, but the numbering area extends beyond Jacksonville itself.
According to the Florida Public Service Commission, the numbering area serves all or most of Duval, Nassau, Baker, Bradford, Clay, St. Johns, and Union counties. Communities within the region include Jacksonville, Jacksonville Beach, Fernandina Beach, Orange Park, and surrounding areas.
Because an area code covers a telecommunications numbering region rather than following every city or county boundary perfectly, it is better to think of 904 as representing the greater Jacksonville and northeast Florida region rather than a single city.
What Cities Use the 904 Area Code?
Jacksonville is at the center of the 904 Area Code, but many other communities share the same numbering region.
Some of the places associated with the 904/324 numbering area include:
- Jacksonville
- Jacksonville Beach
- Fernandina Beach
- Orange Park
- Atlantic Beach
- Neptune Beach
- Ponte Vedra Beach
- Middleburg
- Green Cove Springs
- Macclenny
- Callahan
- Yulee
- Baldwin
- Starke
The numbering region therefore includes communities along Florida’s Atlantic coast as well as inland areas west and southwest of Jacksonville.
A 904 phone number should not, however, be treated as proof that the caller is physically located in one of these places at the time of the call. Mobile numbers can travel with their owners, and internet-based phone services can allow customers to retain numbers while living or working elsewhere.
What Time Zone Does Area Code 904 Use?
The 904 Area Code is in the Eastern Time Zone.
That means the region observes Eastern Standard Time (EST), UTC−5, during the standard-time portion of the year. When daylight saving time is in effect, northeastern Florida follows Eastern Daylight Time (EDT), UTC−4.
This matters when calling the Jacksonville area from another U.S. time zone or from another country. Checking the current local time before making a business or personal call can help avoid contacting someone too early or too late.
The 324 Overlay and What It Means for 904 Numbers
One of the most important recent changes involving the 904 Area Code is the introduction of area code 324.
Growing demand for telephone numbers meant the supply of available 904 numbers was becoming insufficient. The Florida Public Service Commission approved an all-services distributed overlay rather than dividing the existing region into separate geographic areas.
The overlay means that 904 and 324 serve the same geographic territory. Existing customers did not have to change their 904 numbers simply because the new code was introduced.
Mandatory 10-digit dialing began on January 29, 2024. New 324 numbers could begin entering service from February 26, 2024.
As a result, two people or businesses located in the same community may now have different area codes—one might use 904 while another uses 324.
How Do 904 Phone Numbers Work?
A standard 904 Area Code telephone number follows the North American Numbering Plan format:
(904) XXX-XXXX
The complete domestic number contains 10 digits: a three-digit area code, a three-digit central office code or prefix, and a four-digit subscriber number.
Because 324 overlays the same geographic region, callers within the area use 10-digit dialing for local calls. In practical terms, that means dialing the area code plus the seven-digit telephone number rather than relying on only the local seven digits.
The introduction of 324 did not change existing 904 numbers, local calling areas, or the cost of calls simply because of the overlay.
Can You Identify a Caller by a 904 Number?
Seeing the 904 Area Code on caller ID provides a useful geographic clue: the number was assigned within the northeast Florida numbering region. It does not guarantee that the person making the call is currently in Florida.
People often keep mobile numbers after relocating. Businesses may also use cloud-based or Voice over Internet Protocol services that allow calls to be made from locations far outside the number’s original area.
Caller ID can also be spoofed. Scammers sometimes manipulate the displayed number to make a call appear local or familiar. Therefore, the area code alone should never be used to decide whether an unknown call is legitimate.
If a caller requests money, passwords, verification codes, banking information, or other sensitive details, verify the organization independently using contact information from its official website, statement, or account portal.
Why Does Northeast Florida Have Two Area Codes?
The addition of 324 reflects a common solution to increasing demand for phone numbers.
Instead of geographically splitting the 904 Area Code and requiring some existing customers to adopt a different code, regulators selected an overlay. Both codes can therefore be assigned throughout the same numbering area.
The North American Numbering Plan Administrator announced the implementation schedule for the 324 overlay in 2022. The transition included a permissive dialing period before mandatory 10-digit dialing took effect.
For consumers, the practical difference is simple: a new northeast Florida telephone number might begin with either 904 or 324.
Calling a 904 Number From Outside the United States
The United States uses country calling code +1. To call a 904 Area Code number from abroad, the typical international format is:
+1 904 XXX XXXX
The exact method for entering the plus sign or international access prefix depends on the country and telephone service being used.
International charges may also apply depending on the caller’s mobile carrier, landline provider, or internet calling service. The 904 prefix itself does not determine the international calling price.
Frequently Asked Questions
What state is area code 904 in?
Area code 904 is in Florida. It primarily serves Jacksonville and surrounding communities in the northeastern part of the state.
Is 904 a Jacksonville area code?
Yes. The 904 Area Code is strongly associated with Jacksonville, but its coverage extends beyond the city to other communities in northeast Florida, including Jacksonville Beach, Fernandina Beach, Orange Park, and surrounding areas.
What time zone is area code 904 in?
The region follows Eastern Time. It observes EST during standard time and EDT when daylight saving time is in effect.
Are 904 and 324 the same area?
They cover the same geographic numbering area. Area code 324 was introduced as an overlay, meaning new telephone numbers can use 324 without changing the geographic boundaries traditionally served by 904.
Do I need to dial all 10 digits for a local 904 call?
Yes. Ten-digit dialing is required in the 904/324 overlay region. Callers should dial the three-digit area code followed by the seven-digit telephone number.
Does a 904 number mean the caller is currently in Florida?
No. A 904 Area Code number indicates where the number was assigned, not necessarily where its owner is currently located. Mobile-number portability, internet calling services, and caller-ID spoofing mean a caller may be somewhere else entirely.
Conclusion
The 904 Area Code represents Jacksonville and a substantial part of northeastern Florida, including nearby coastal, suburban, and inland communities. The region follows Eastern Time and now shares its geographic coverage with the 324 overlay.
For callers, the most important practical change is 10-digit dialing. For anyone identifying an unfamiliar number, 904 remains a useful indication of northeast Florida origins, but it should be treated as a numbering clue rather than proof of a caller’s present location or identity.
Read Also: 404 Area Code Location: Cities, State and Time Zone
