Area code 336 vs 743
336 and 743 are overlay codes: they cover the same ground in North Carolina, and a number in one is a local call to the other. 336 is the original, in service since 1997. 743 was added in 2016 because the first was filling up – that is what an overlay is for. Today 336 has 783 of 786 blocks assigned (99.6%) and 743 has 163 of 786 (20.7%), so a new number in the area now almost always comes from 743. In the 33 days to 30 October 2026, 336 drew 906 FTC complaints against 288 for 743 – 61st and 311th of 422 ranked codes. Older codes are spoofed more because they look more established. Neither code is better or safer than the other. They are the same geography, the same carriers and the same dialing rules; the difference is only how long each has existed and how full it is.
Side by side
| 336 | 743 | |
|---|---|---|
| In service since | 1997 | 2016 |
| Region | North Carolina | North Carolina |
| Blocks assigned | 783 of 786 (99.6%) | 163 of 786 (20.7%) |
| Largest block holder | AT&T 29% | Other CLEC / VoIP 32.5% |
| Complaints, 28 Sep – 30 Oct 2026 | 906 (#61) | 288 (#311) |
| Rate centers | 88 | 66 |
Block share is allocation by the numbering administrator, not subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and measure how often each code is spoofed on caller ID.
Frequently asked
What is the difference between area codes 336 and 743?
None geographically – they overlay the same area, so the difference is age and how many numbers are left.
Do I need to dial the area code between 336 and 743?
Yes. Overlay areas use ten-digit dialing for local calls, including between the two codes. Seven digits reaches a recording.
Will a new number be 336 or 743?
Whichever has blocks left – currently 743, at 20.7% allocated against 99.6% for the other. Carriers draw from the code with free blocks, which is why the newer code spreads over time.
Is 336 or 743 more likely to be a spam call?
On the complaint data, 336 appears more often. But spoofing drives those counts, so this is about which code gets imitated, not which numbers are real.
Sources
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
Each code on its own: 336 · 743. All codes in North Carolina: North Carolina area codes.