As the largest city in the continental United States by land area, Jacksonville anchors Florida’s First Coast with one dominant area code and a fresh overlay on the way. Whether you are setting up a business line, verifying an unknown caller, or activating a new number, this guide covers every area code serving Jacksonville and Duval County, along with local dialing rules, major ZIP codes, and scam warnings.
Jacksonville Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code(s) | 904 |
| Overlay Area Code(s) | 324 |
| Time Zone | Eastern Time (ET) – EST / EDT |
| Major County | Duval County |
| Dialing Format | 10-digit dialing required |
Area Code Breakdown & District Mapping
904 – Jacksonville’s Original Code
Area code 904 has served Jacksonville and northeast Florida since it split from 305 in 1965. It blankets Duval County and reaches into Clay, Nassau, and St. Johns counties, making it the defining code for Florida’s largest city by land area.
324 – Jacksonville Overlay
Area code 324 is the newly assigned overlay for the 904 region. As existing 904 numbers are exhausted, fresh lines in Jacksonville may be issued a 324 number, so residents should treat both codes as local.
Neighborhoods & Local Coverage
Jacksonville’s 904 footprint covers a sprawling metro that runs from the historic urban core — Downtown, Riverside, Avondale, and San Marco — out to Southside, Mandarin, and Arlington. The city straddles the St. Johns River, and the same area code connects both the Northbank business district and the leafy residential neighborhoods to the south.
The code also reaches the beaches communities of Jacksonville Beach, Atlantic Beach, and Neptune Beach, plus growing suburbs like Nocatee and Fleming Island in adjacent counties. Whether you are calling a business in Springfield or a home in Ortega, the 904/324 pairing keeps the entire First Coast on a single dialing plan.
Local Dialing Rules & International Format
Because the 904 region now shares numbers with the 324 overlay, all local calls in Jacksonville require 10-digit dialing (area code + 7-digit number). Dialing only seven digits will no longer complete a call. There is no need to add a leading 1 for local calls within the metro.
To call Jacksonville from outside the United States, dial your country’s exit code, then the U.S. country code +1, followed by the 10-digit number (for example, +1 904 XXX-XXXX). From inside the U.S. and Canada, simply dial 1 before the 10-digit number for long-distance calls.
Major ZIP Codes Covered
The 904 service area spans many of Jacksonville’s core ZIP codes, including 32202, 32204, 32207, 32209, 32210, 32216, 32218, 32225, 32246, and 32256.
Spam & Scam Call Warnings in Jacksonville
Jacksonville residents frequently report robocalls that spoof local 904 prefixes to appear as a neighbor or nearby business. Common scams target the area’s large military and veteran population with fake benefit or warranty offers.
| Scam Type | What to Watch For |
|---|---|
| Neighbor Spoofing | Calls that mimic a local 904 prefix to look familiar. |
| Utility / Toll Scams | Threats to shut off power or demand toll payment via gift cards. |
| IRS / Immigration | Robocalls claiming legal action — government agencies never call to demand instant payment. |
Red flag: Any caller who pressures you to pay immediately with gift cards, wire transfers, or cryptocurrency is almost certainly running a scam. Hang up and verify through an official number.
↑ See the complete list of All US Area Codes by State for every code across the country.
Nearby & Related Florida Cities
Frequently Asked Questions
What area code is Jacksonville, FL?
Jacksonville’s primary area code is 904, in service since 1965. A new overlay, 324, is being layered over the same region.
Do I have to dial the area code in Jacksonville?
Yes. With the 324 overlay now active, Jacksonville requires 10-digit dialing for all local calls.
Is 324 a real Jacksonville area code?
Yes. 324 is the FCC-approved overlay for the 904 region covering Jacksonville and northeast Florida.
What time zone is Jacksonville in?
Jacksonville observes Eastern Time (EST/EDT), the same zone as Miami, Orlando, and most of Florida.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.