--- title: "Area code 645: Florida, United States" url: "https://lookvalid.com/area-code/645.md" canonical_url: "https://lookvalid.com/area-code/645" last_updated: "2026-10-23" type: "reference" summary: "Area code 645 serves Florida, United States. Number formats, numbering rules, a live phone validator and the other codes in Florida." --- # Area code 645: Florida, United States Area code 645 serves Florida, United States. Number formats, numbering rules, a live phone validator and the other codes in Florida. NANPA lists 75 central office codes (prefixes) in use in area code 645, held by 18 holders across 5 rate centers. The largest rate center is MIAMI, with 37 prefixes (49%). New Cingular Wireless PCS holds the most prefixes, 17 (23%). 97% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 242 complaints on file for 235 numbers in 645, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 2023-08-04 - Time zone: Eastern (E) - Assigned overlays: 305 (1947-01-01), 786 (1998-03-01) - Prefixes in use: 75 - Pooled prefixes: 73 (97%) - Rate centers: 5 - Companies holding prefixes: 18 - Assignment dates on file: 2023-10-19 to 2026-06-08 (75 prefixes) - ZIP codes in its places: 104 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | MIAMI | 37 | 49% | | NORTH DADE | 14 | 19% | | HOMESTEAD | 9 | 12% | | KEYS | 8 | 11% | | PERRINE | 7 | 9% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | New Cingular Wireless PCS | 17 | 23% | | Onvoy | 13 | 17% | | Wide Voice | 9 | 12% | | Eon Telecom | 5 | 7% | | IP Horizon | 5 | 7% | | Omnipoint Miami E License | 5 | 7% | | 12 other carriers | 21 | 28% | 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 - 1947-01-01: Area code 305, named as the parent of 645 in the NANPA report, was in service. - 2023-08-04: Area code 645 went into service. ## Nearest area codes The area codes closest to 645, measured between the centers of the ZIP code places they serve, are 754 (about 19 miles), 954 (about 19 miles), 561 (about 54 miles), 728 (about 54 miles) and 239 (about 105 miles). ## ZIP codes 104 ZIP codes fall in places that have a rate center in this area code. The places with the most are Miami, FL (95 ZIP codes) and Homestead, FL (9 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 242 complaints for 235 numbers. Numbers whose latest complaint falls in each year: - 2023: 0 - 2024: 31 - 2025: 115 ## Questions ### Where is area code 645? NANPA assigns area code 645 to Florida, United States. ### In which state does area code 645 sit? Florida. 645 is one of 23 area codes the NANPA table assigns to the state. ### Which places does area code 645 cover? The places with the most ZIP codes among the rate centers in 645 are Miami, FL and Homestead, FL. The rate center list on this page shows all of them. ### Who owns area code 645? NANPA assigns area codes. Within 645, New Cingular Wireless PCS holds the most prefixes, 17 prefixes or 23%. ### Which time zone does 645 use? The NANPA NPA report lists the time zone for 645 as Eastern (E). ### What year did 645 enter service? The NANPA NPA report gives an in-service date of 2023-08-04, so 645 has been in use since 2023. ### Does area code 645 have an overlay? Yes. 305 (in service 1947-01-01) and 786 (in service 1998-03-01) share the same area with 645, so numbers from all of them are local to each other. ### Which area codes are nearest to 645? The area codes closest to 645, measured between the centers of the ZIP code places they serve, are 754 (about 19 miles), 954 (about 19 miles), 561 (about 54 miles), 728 (about 54 miles) and 239 (about 105 miles). ### How many prefixes does area code 645 have? NANPA's report dated 2026-10-17 lists 75 prefixes in service in 645, spread over 5 rate centers and 18 holders. ### Are there complaints about 645 numbers? The FCC data on file has 242 complaints for 235 numbers in 645. 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).