--- title: "Area code 904: Florida, United States" url: "https://lookvalid.com/area-code/904.md" canonical_url: "https://lookvalid.com/area-code/904" last_updated: "2026-10-23" type: "reference" summary: "Area code 904 serves Florida, United States. Number formats, numbering rules, a live phone validator and the other codes in Florida." --- # Area code 904: Florida, United States Area code 904 serves Florida, United States. Number formats, numbering rules, a live phone validator and the other codes in Florida. NANPA lists 785 central office codes (prefixes) in use in area code 904, held by 49 holders across 20 rate centers. The largest rate center is JACKSONVL, with 483 prefixes (62%). 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. The FCC unwanted-call data has 4,055 complaints on file for 3,165 numbers in 904, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - 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 | 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% | ## Carriers | 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. ## History - 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. ## Nearest area codes 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). ## ZIP codes 15 ZIP codes fall in places that have a rate center in this area code. The places with the most are Orange Park, FL (3 ZIP codes), Middleburg, FL (2 ZIP codes) and Yulee, FL (2 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes. ## Complaints on file 4,055 complaints for 3,165 numbers. Numbers whose latest complaint falls in each year: - 2023: 177 - 2024: 192 - 2025: 140 ## Questions ### 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. Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).