North American Numbers Source-cited · ownership disclosed
Area code
743
In service
United States · since 2016

Piedmont Triad (overlay)

Area code 743 is an all-services overlay of area code 336 covering the Piedmont Triad and northwestern North Carolina. It was added in 2015 and shares the same geography as 336.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Piedmont Triad (overlay)
Type
geographic
Status
in service
In service since
2016
Projected exhaust
2071 Q2

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 743 is

Same geography as 336: north-central and northwestern NC (Piedmont Triad plus northern Foothills/Mountains)..

Communities served wholly or partly by 743:

GreensboroWinston-SalemHigh PointBurlingtonAsheboro

Coextensive with 336; not tied to any single city.

B · Relationships

How it relates to other codes

The codes 743 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Overlay · 2015 336 Piedmont Triad (Greensboro / Winston-Salem) 743 overlays the entire 336 numbering plan area (same geography, both sides).
What's changing. Overlay code over 336; not a standalone geography.
C · History

How 743 got here

2015-10-24
Permissive 10-digit dialing began for the 743 overlay.
Source: Wikipedia
2016-04-23
Mandatory 10-digit dialing took effect.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
174
Prefixes available
626
Thousands-blocks assigned
1,262

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 743 with another code →
Sources
Wikipedia ↗
Area codes 336 and 743
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.