743 area code — Greensboro, NC geographic
- State
- North Carolina
- Major area
- Greensboro
- Time zone
- Eastern
- In service since
- 2016-05-23
- Split from
- 336
- Overlay complex
- 336 / 743
- Active prefixes
- 157
- Rate centers
- 66
- Carriers
- 32
- Projected exhaust
- 2Q 2071
Phone numbers beginning 743 are registered to the Greensboro area of North Carolina (Eastern time zone). The code entered service on May 23, 2016. Together with 336 it forms the 336/743 overlay. Because of number portability and VoIP, the area code tells you where the number was issued, not where the caller is right now.
NANPA lists 157 active NXX prefixes in 743, assigned to 32 carriers. 157 of those prefixes are pooled — shared between carriers in thousands-number blocks. The code spans 66 rate centers (billing localities).
To check where a specific 743 number was issued, look up its six-digit prefix; to check who is actually calling, ignore the display and verify through an official callback number — caller ID is assertable and routinely spoofed.
Its parent code is 336, which it left in 2016.
Official projections put exhaust for the 336/743 complex at 2Q 2071.
The dialing plan is 10D for home-NPA local calls and 10D across codes.
Largest localities in 743
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Greensboro | 20 | 336 |
| Winston-salem | 19 | 336 |
| Burlington | 12 | 336 |
| Lexington | 7 | 336 |
| Summerfield | 6 | 336 |
| Asheboro | 6 | 336 |
| High Point | 5 | 336 |
| Mount Airy | 4 | 336 |
| Gatewood | 3 | 336 |
| Gibsonville | 3 | 336 |
FAQ
Will 743 run out of numbers?
NANPA's current forecast projects exhaust in 2Q 2071 — decades of capacity remain.
Why am I getting spam calls from 743 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 743 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 743 number from?
743 is assigned to Greensboro and surrounding areas of North Carolina in the Eastern time zone. The three digits after the area code (the prefix) narrow it down to a rate center.