Area code
743
743 is a United States area code. Under the North American Numbering Plan it belongs to North Carolina, which has 10 area codes in total.
Validate a number in 743
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.
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Area code 743 at a glance
NANPA lists 158 central office codes (prefixes) in use in area code 743, held by 33 holders across 66 rate centers.
| Fact | Value |
|---|---|
| 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 in area code 743
| 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% |
Who holds the prefixes in 743
Onvoy holds the most prefixes, 34 (22%). 100% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| 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. Find which carrier a number is on, or browse the prefix holders.
History of area code 743
- 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.
Area codes nearest to 743
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
ZIP codes in area code 743
83 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Greensboro, NC | 28 |
| High Point, NC | 7 |
| Lexington, NC | 4 |
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 743 numbers
269 FCC complaints are on file for 258 numbers in 743, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 32 |
| 2024 | 49 |
| 2025 | 24 |
Other area codes in North Carolina
North Carolina is one state with 10 area codes in the NANPA table. 743 is one of them.
Next to 743 in the numbering table
These are the codes just before and after 743 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 743 was first assigned in North Carolina. 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 North Carolina next to a 743 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 743
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.
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.