The 904 area code serves Jacksonville and northeast Florida, covering the state’s largest city by area and the historic First Coast. In service since 1965, it is a geographic area code anchoring Duval County and its neighbors. If a 904 number has appeared on your caller ID, this guide explains where it comes from, how to dial it, and how to stay safe from spoofed calls.
Quick Summary: Area Code 904 at a Glance
| Detail | Information |
|---|---|
| Area Code | 904 |
| State | Florida (FL) |
| Major Cities | Jacksonville, St. Augustine, Orange Park, Fernandina Beach |
| Time Zone | Eastern Time (ET) |
| Country Code | +1 (USA) |
| Overlay Codes | None (standalone) |
Geographic Coverage & Major Cities
Area code 904 covers northeast Florida, including Duval, St. Johns, Clay, and Nassau counties along the Atlantic coast near the Georgia border.
- Jacksonville – the most populous city in Florida and the largest by land area in the contiguous US
- St. Augustine – the oldest continuously occupied European-founded city in the country
- Orange Park & Fleming Island – Clay County suburbs
- Fernandina Beach & Amelia Island – Nassau County coastal communities
From a major port and naval hub to historic St. Augustine, a 904 number is closely tied to the identity of northeast Florida.
A Brief History of Area Code 904
Area code 904 was created in 1965 and once covered much of northern Florida. Over the decades it shrank as new codes split off, including 352 for north-central Florida in 1995, 850 for the Panhandle in 1997, and 386 for the Daytona and Lake City area in 2001. Today 904 anchors the Jacksonville region on a single area code.
Time Zone & Best Time to Call
Numbers in the 904 area code use Eastern Time (ET). The region observes Daylight Saving Time, shifting from EST (UTC-5) to EDT (UTC-4) between March and November each year.
How to Dial Phone Numbers in Area Code 904
Because 904 has no overlay, both 7-digit and 10-digit local dialing have historically worked, but 10-digit dialing is now the recommended standard across the United States.
Calling within the United States or Canada
- 10-digit dialing: Include the area code – 904-XXX-XXXX.
- 11-digit dialing: You can also dial 1-904-XXX-XXXX; the leading 1 is the NANP country code.
Calling from outside the United States
- Format: [exit code] + 1 + 904 + XXX + XXXX
- From the UK, Europe, or most of Asia/Africa: 00 1 904 XXX XXXX
- From any mobile phone worldwide: +1 904 XXX XXXX
Is Area Code 904 a Scam? Safety & Protection Tips
Area code 904 is a legitimate Florida area code – a call from it is not fraudulent by default. However, scammers frequently spoof local codes like 904, faking the caller ID so their number appears to come from a trusted local line. Neighbor spoofing, which mimics the first six digits of your own number, is especially common.
Common scam tactics linked to this region
| Scam type | What to watch for |
|---|---|
| Government & military impersonation | Callers posing as the IRS, SSA, or VA targeting the large Navy community |
| Bank & card fraud alerts | Claims of suspicious activity seeking your account details |
| Utility shut-off threats | Fake JEA disconnection demands |
| Storm & disaster relief scams | Bogus repair or FEMA-related appeals after hurricanes |
How to report, block, and look up 904 callers
- Never share personal or financial details with an unexpected caller, however urgent they sound.
- Block the number using your phone’s built-in call-blocking feature or a reputable call-screening app.
- Look up the number with a trusted reverse phone lookup before returning any call.
- Report it to the FTC at reportfraud.ftc.gov and register at DoNotCall.gov.
Nearby & Related Area Codes in Florida
Area code 904 shares and borders several other Florida codes:
- 386 – the Daytona Beach and Lake City area to the south, split from 904 in 2001 (see our 386 area code guide)
- 352 – north-central Florida to the southwest (see our 352 area code guide)
- 850 – the Florida Panhandle to the west (see our 850 area code guide)
- 407 & 689 – the Orlando metro to the south (see our 407 area code guide)
Explore more codes across the state on our Florida area codes hub, or browse every prefix in our US area codes directory.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Florida:
Frequently Asked Questions About Area Code 904
Where is the 904 area code located?
Area code 904 covers Jacksonville and northeast Florida, including St. Augustine, Orange Park, and Fernandina Beach. It operates on Eastern Time.
Does the 904 area code have an overlay?
No. Area code 904 currently covers the Jacksonville region on a single area code, without a second overlay code layered on top.
Is 904 a landline or cell phone area code?
Both. Area code 904 serves landlines, mobile phones, and VoIP numbers throughout northeast Florida.
Should I answer a call from an unknown 904 number?
If you are not expecting the call, let it go to voicemail. Legitimate callers leave a message, while spoofed or robocall numbers usually will not. Verify any unfamiliar number with a reverse lookup before calling back.
Related 904 Guides
- Is a 904 call safe? Read Is area code 904 a scam? Spam & safety guide.
- Local coverage: see the Jacksonville area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.