--- title: "Area code 743: North Carolina, United States" url: "https://lookvalid.com/area-code/743.md" canonical_url: "https://lookvalid.com/area-code/743" last_updated: "2026-10-23" type: "reference" summary: "Area code 743 serves North Carolina, United States. Number formats, numbering rules, a live phone validator and the other codes in North Carolina." --- # Area code 743: North Carolina, United States Area code 743 serves North Carolina, United States. Number formats, numbering rules, a live phone validator and the other codes in North Carolina. NANPA lists 158 central office codes (prefixes) in use in area code 743, held by 33 holders across 66 rate centers. Onvoy holds the most prefixes, 34 (22%). 100% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 269 complaints on file for 258 numbers in 743, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 2016-05-23 - Time zone: Eastern (E) - Assigned overlays: 336 (1997-12-15) - Prefixes in use: 158 - Pooled prefixes: 158 (100%) - Rate centers: 66 - Companies holding prefixes: 33 - Assignment dates on file: 2016-04-06 to 2026-05-28 (157 prefixes) - ZIP codes in its places: 83 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | GREENSBORO | 21 | 13% | | WINSTN SAL | 19 | 12% | | BURLINGTON | 12 | 8% | | LEXINGTON | 7 | 4% | | ASHEBORO | 6 | 4% | | SUMMERFLD | 6 | 4% | | HIGH POINT | 5 | 3% | | MOUNT AIRY | 4 | 3% | | 58 other rate centers | 78 | 49% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | Onvoy | 34 | 22% | | Ton80 Communications | 21 | 13% | | Verizon Wireless | 13 | 8% | | Fractel | 11 | 7% | | Bandwidth.com CLEC | 10 | 6% | | Onvoy Spectrum | 9 | 6% | | 27 other carriers | 60 | 38% | 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 - 1997-12-15: Area code 336, named as the parent of 743 in the NANPA report, was in service. - 2016-05-23: Area code 743 went into service. ## Nearest area codes The area codes closest to 743, measured between the centers of the ZIP code places they serve, are 704 (about 74 miles), 980 (about 74 miles), 919 (about 75 miles), 984 (about 75 miles) and 434 (about 103 miles). ## ZIP codes 83 ZIP codes fall in places that have a rate center in this area code. The places with the most are Greensboro, NC (28 ZIP codes), High Point, NC (7 ZIP codes) and Lexington, NC (4 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 269 complaints for 258 numbers. Numbers whose latest complaint falls in each year: - 2023: 32 - 2024: 49 - 2025: 24 ## Questions ### Where is area code 743? NANPA assigns area code 743 to North Carolina, United States. ### In which state does area code 743 sit? North Carolina. 743 is one of 10 area codes the NANPA table assigns to the state. ### Which places does area code 743 cover? The places with the most ZIP codes among the rate centers in 743 are Greensboro, NC, High Point, NC and Lexington, NC. The rate center list on this page shows all of them. ### Who owns area code 743? NANPA assigns area codes. Within 743, Onvoy holds the most prefixes, 34 prefixes or 22%. ### Which time zone does 743 use? The NANPA NPA report lists the time zone for 743 as Eastern (E). ### What year did 743 enter service? The NANPA NPA report gives an in-service date of 2016-05-23, so 743 has been in use since 2016. ### Does area code 743 have an overlay? Yes. 336 (in service 1997-12-15) shares the same area with 743, so numbers from all of them are local to each other. ### Which area codes are nearest to 743? The area codes closest to 743, measured between the centers of the ZIP code places they serve, are 704 (about 74 miles), 980 (about 74 miles), 919 (about 75 miles), 984 (about 75 miles) and 434 (about 103 miles). ### How many prefixes does area code 743 have? NANPA's report dated 2026-10-17 lists 158 prefixes in service in 743, spread over 66 rate centers and 33 holders. ### Are there complaints about 743 numbers? The FCC data on file has 269 complaints for 258 numbers in 743. 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).