The 743 area code covers the same area as 336, including Greensboro, Winston-Salem and 56 more places in North Carolina.
Area code 743 is in North Carolina, on Eastern Time. In the 743 area, phone numbers are given out most in Guilford County, then Forsyth and Alamance counties. It has been in service since May 23, 2016. 336 covers the same area, so two neighbours can have different area codes.
- Where
- 8 counties in North Carolina, mostly Guilford County, Forsyth County and Alamance County
- Time zone
- Eastern Time
- In service since
- May 23, 2016
- Shares its area with
- 336 (since 1997)
- Prefixes in use
- 160
- How to dial
- Local calls need all 10 digits: 743-555-0142.
Find out who called you from a 743 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (743) number is on today, use our free carrier lookup.
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Greensboro holds 13% of the phone prefixes in area code 743.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 160 prefixes in use shows where 743 numbers are actually given out.
- Greensboro21 prefixes, 13%
- Winston-Salem19 prefixes, 12%
- Burlington13 prefixes, 8%
- Lexington7 prefixes, 4%
- High Point6 prefixes, 4%
- Summerfield6 prefixes, 4%
- Asheboro6 prefixes, 4%
- Mount Airy4 prefixes, 3%
Also served: Roxboro, Elkin, Kernersville and Mount Airy and 46 smaller places.
Of the carriers named here, Ton80 Communications holds the most phone number prefixes in area code 743: 21 of 160.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 160 prefixes in use in 743 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Ton80 Communications | 21 | 13% |
| Fractel | 11 | 7% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 10 | 6% |
| Charter (Spectrum)Cable company's phone service | 7 | 4% |
| Metro by T-MobileT-Mobile's prepaid brand | 7 | 4% |
| T-MobileMobile network | 7 | 4% |
| 25 other carriers | 97 | 61% |
100% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
743 started in 2016 as an overlay on 336, and its ground has not changed since.
2016
743 starts on May 23, 2016, as an overlay on 336: new numbers on the same ground.
A 743 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 743 are 704, 919 and 276.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
North Carolina has 9 other area codes.
These are the questions people ask most about area code 743.
Where is area code 743?
743 covers Greensboro, Winston-Salem, High Point and Burlington and 54 more places in North Carolina. In the 743 area, phone numbers are given out most in Guilford County, then Forsyth and Alamance counties.
What state is area code 743 in?
North Carolina. 743 is a North Carolina area code on Eastern Time.
What cities use area code 743?
The places holding the most 743 prefixes are Greensboro, Winston-Salem, High Point, Burlington, Lexington, Asheboro, Reidsville and North Wilkesboro, out of 58 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 743?
No single phone company owns 743. NANPA's records list its 160 prefixes across many carriers, and the ones named on this page include Ton80 Communications, Fractel and Bandwidth. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 743 in?
743 is on Eastern Time.
When did area code 743 start?
743 went into service on May 23, 2016, as an overlay on 336: new numbers for the same area.
Is 743 the same area as 336?
Yes. 336 (since 1997) covers the same ground as 743. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 743 number?
Local calls need all 10 digits: 743-555-0142.
Is 743 a toll-free number?
No. 743 is a regular area code for Greensboro and Winston-Salem in North Carolina, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 743?
The closest are 704/980 (Charlotte, North Carolina), 919/984 (Raleigh, North Carolina), 276 (Norton, Virginia) and 434 (Charlottesville, Virginia), measured between the centres of each area.
Who called me from a 743 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 743 a scam?
743 is a real North Carolina area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.