904 Area Code: A Complete Guide to Jacksonville, Florida

Introduction

Say "904" anywhere in northeast Florida and people picture the same stretch of coast: Jacksonville, the beaches, historic St. Augustine and the fast-growing suburbs of the First Coast. For sixty years this code has been the dial-tone identity of a region that grew from a river port into the most populous city in Florida by land area and one of the largest on the Atlantic seaboard. This guide lays out exactly where 904 reaches today, how it was created and later reshaped, the new overlay that brought ten-digit dialing, and how any business can claim a local Jacksonville presence with a number of its own.

What Is the 904 Area Code?

The 904 prefix is the principal area code for Jacksonville and the First Coast of northeast Florida. It is a geographic code with deep roots — unlike an overlay that simply layers onto an existing region, 904 has its own defined territory that it has held, in one form or another, since 1965. Like California's 661 area code, it is a geographic code with a single, well-defined home territory rather than an overlay scattered across another region's map.

Because it covers Jacksonville proper plus the ring of beach towns and suburbs across Duval, St. Johns, Clay and Nassau counties, a 904 number reads as unmistakably local. To a customer in Orange Park, Fernandina Beach or Ponte Vedra, it looks like a neighbor on the caller ID rather than a stranger from out of state — a small but real credibility signal for any business working the region.

Geographic Coverage and the Cities It Serves

The 904 code is centered on Duval County and spreads across the surrounding First Coast counties of Nassau, Baker, Clay and St. Johns, with small reaches into Bradford and Union. It blankets the northeast corner of Florida, where downtown Jacksonville gives way to Atlantic beaches, historic towns and booming bedroom communities. The major communities include:

• Jacksonville — the heart of the code and the most populous city in Florida, straddling the St. Johns River in Duval County
• The Beaches — Jacksonville Beach, Atlantic Beach, Neptune Beach and Ponte Vedra Beach along the Atlantic shore
• St. Johns County — St. Augustine, the oldest continuously occupied European city in the U.S., plus fast-growing St. Johns and Nocatee
• Clay and Nassau counties — Orange Park, Fleming Island, Green Cove Springs, Middleburg, and Fernandina Beach and Yulee on Amelia Island
• The outer towns — Macclenny and Glen St. Mary in Baker County, and Starke, Lawtey and Callahan on the rural edges

It is a large and still-expanding territory — a revitalized urban core along the river, master-planned communities filling in St. Johns and Clay counties, and historic coastal towns drawing new residents every year. That steady growth is exactly why a single area code eventually ran short of numbers.

The Splits and the 324 Overlay

When 904 was created in 1965, it was carved from Florida's original 305 code and covered the entire northern half of the state. For decades that was plenty. But as Florida boomed, the code was trimmed again and again. In 1988 the east coast around Orlando and the Space Coast was carved off as the new 407 area code, in 1995 the Ocala and Gainesville area was assigned 352, and in July 2001 the Daytona Beach region and a second pocket were split off as 386. What remained was a tighter 904 focused squarely on Jacksonville and the First Coast.

Even that tighter region eventually ran low on numbers. Rather than split the First Coast again and force anyone to change their number, the Florida Public Service Commission chose an overlay: a new code, 324, laid across the exact same territory. Mandatory ten-digit dialing began on January 29, 2024, and 324 numbers entered service on February 26, 2024. Every existing 904 number stayed the same — the only change was that every local call now has to include the area code.

Time Zone and How to Dial

The entire 904 region observes Eastern Time — UTC-5 in winter (EST) and UTC-4 during daylight saving (EDT), which runs from March to November. Because Jacksonville has shared its territory with the 324 overlay since 2024, ten-digit dialing is mandatory for every local call:

• Local and regional calls: dial all ten digits — 904-555-1234.
• Long-distance from elsewhere in the U.S.: add a leading 1 — 1-904-555-1234.
• International: dial the exit code, then +1, then the number — +1 (904) 555-1234.

Benefits of a 904 Number for Business

A local number is one of the simplest trust signals a business can own. When a First Coast customer sees a familiar 904 number, the call reads as a neighbor rather than an out-of-state cold call.

• Local credibility: people are far more likely to answer a call from a familiar Jacksonville code.
• Coastal-market reach: a 904 number signals a presence across the growing First Coast, from the beaches to St. Augustine.
• Work from anywhere: cloud calling lets a company hold a local 904 line while operating from anywhere.
• Better customer connections: a local number lowers the friction of every inbound inquiry.

How to Get a 904 Phone Number

Securing a 904 number is simple, whether for a single line or a full team.

• Choose a provider: options range from traditional carriers to cloud platforms like Acepeak that assign numbers online.
• Pick or port a number: browse the available 904 inventory, or transfer an existing local line.
• Verify details: provide basic business and billing information.
• Activate: cloud providers often go live in minutes rather than days.

Scam Awareness and Staying Safe

Because a local code looks trustworthy, scammers sometimes spoof it to appear nearby. A 904 number on the caller ID still deserves the same scrutiny as any other.

• Never share sensitive details — bank information or a Social Security number — with an unexpected caller.
• Verify urgent requests by hanging up and calling back on an official, published number.
• Use call-blocking and spam-filtering tools to screen unknown numbers.
• Report suspicious calls to the provider or the relevant authorities so others are protected.

The Future of the 904 Prefix

Jacksonville is one of the fastest-growing large cities in the Southeast, so demand for numbers across the First Coast is only rising. But future relief will now come through the 324 overlay rather than another split, which leaves every existing 904 number untouched. Residents and businesses are already adjusting to ten-digit dialing, so additional numbers simply join the same pool. Residents who want fewer unwanted calls on a 904 line can add their number to the state-run Florida Do Not Call registry. The practical takeaway is unchanged: a 904 number remains a recognizable, trusted local identity across Jacksonville and the First Coast.

Conclusion

Jacksonville's 904 prefix is more than a routing code; it is a marker of northeast Florida's First Coast. Born in 1965 from the state's original 305, trimmed to its current shape across three later splits, and joined by the 324 overlay in 2024, it has evolved right alongside the region it serves. For a business, a 904 number remains one of the cheapest, most credible ways to signal local roots — and with cloud calling, that Jacksonville presence is available to anyone, anywhere.