Area code
904
904 is a United States area code. Under the North American Numbering Plan it belongs to Florida, which has 23 area codes in total.
Validate a number in 904
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 904 at a glance
NANPA lists 785 central office codes (prefixes) in use in area code 904, held by 49 holders across 20 rate centers.
| Fact | Value |
|---|---|
| In service since | 1965-07-11 |
| Time zone | Eastern (E) |
| Assigned overlays | 324 (2024-02-26) |
| Prefixes in use | 785 |
| Pooled prefixes | 569 (72%) |
| Rate centers | 20 |
| Companies holding prefixes | 49 |
| Assignment dates on file | 2001-01-04 to 2026-06-30 (380 prefixes) |
| ZIP codes in its places | 15 |
Rate centers in area code 904
The largest rate center is JACKSONVL, with 483 prefixes (62%).
| Rate center | Prefixes | Share |
|---|---|---|
| JACKSONVL | 483 | 62% |
| ST JOHNS | 74 | 9% |
| FERNADNBCH | 35 | 4% |
| ORANGEPARK | 34 | 4% |
| JACKSOLBCH | 22 | 3% |
| MIDDLEBURG | 19 | 2% |
| PNTVDRABCH | 17 | 2% |
| STARKE | 14 | 2% |
| 12 other rate centers | 87 | 11% |
Who holds the prefixes in 904
Southern Bell Tel & Tel holds the most prefixes, 215 (27%). 72% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Southern Bell Tel & Tel | 215 | 27% |
| Powertel Jacksonville Licenses | 88 | 11% |
| New Cingular Wireless PCS | 72 | 9% |
| Verizon Wireless | 53 | 7% |
| Onvoy | 51 | 6% |
| Metropcs | 40 | 5% |
| 43 other carriers | 266 | 34% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 904
- 1965-07-11 Area code 904 went into service.
- 1995-12-03 Area code 352 went into service and names 904 as its parent.
- 1997-06-23 Area code 850 went into service and names 904 as its parent.
- 2001-02-15 Area code 386 went into service and names 904 as its parent.
- 2024-02-26 Area code 324 went into service as an overlay in the same area as 904.
Area codes nearest to 904
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
Overlay codes in the same area
- 324
ZIP codes in area code 904
15 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Orange Park, FL | 3 |
| Middleburg, FL | 2 |
| Yulee, FL | 2 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 904 numbers
4,055 FCC complaints are on file for 3,165 numbers in 904, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 177 |
| 2024 | 192 |
| 2025 | 140 |
Other area codes in Florida
Florida is one state with 23 area codes in the NANPA table. 904 is one of them.
Next to 904 in the numbering table
These are the codes just before and after 904 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 904 was first assigned in Florida. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Florida next to a 904 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 904
Where is area code 904?
NANPA assigns area code 904 to Florida, United States.
In which state does area code 904 sit?
Florida. 904 is one of 23 area codes the NANPA table assigns to the state.
Which places does area code 904 cover?
The places with the most ZIP codes among the rate centers in 904 are Orange Park, FL, Middleburg, FL and Yulee, FL. The rate center list on this page shows all of them.
Who owns area code 904?
NANPA assigns area codes. Within 904, Southern Bell Tel & Tel holds the most prefixes, 215 prefixes or 27%.
Which time zone does 904 use?
The NANPA NPA report lists the time zone for 904 as Eastern (E).
What year did 904 enter service?
The NANPA NPA report gives an in-service date of 1965-07-11, so 904 has been in use since 1965.
Does area code 904 have an overlay?
Yes. 324 (in service 2024-02-26) shares the same area with 904, so numbers from all of them are local to each other.
Which area codes are nearest to 904?
The area codes closest to 904, measured between the centers of the ZIP code places they serve, are 386 (about 40 miles), 352 (about 83 miles), 912 (about 110 miles), 407 (about 123 miles) and 689 (about 123 miles).
How many prefixes does area code 904 have?
NANPA's report dated 2026-10-17 lists 785 prefixes in service in 904, spread over 20 rate centers and 49 holders.
Are there complaints about 904 numbers?
The FCC data on file has 4,055 complaints for 3,165 numbers in 904. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.