North American Numbers Source-cited · ownership disclosed
Area code
336
In service
United States · since 1997

Piedmont Triad (Greensboro / Winston-Salem)

Area code 336 serves north-central and northwestern North Carolina, centered on the Piedmont Triad. It was created in a 1997 split from area code 910 and is now overlaid by 743.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Piedmont Triad (Greensboro / Winston-Salem)
Type
geographic
Status
in service
In service since
1997
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 336 is

North-central and northwestern NC (Piedmont Triad plus northern Foothills/Mountains), including Guilford, Forsyth, Alamance, Randolph, Rockingham, Surry and Watauga counties..

Communities served wholly or partly by 336:

GreensboroWinston-SalemHigh PointBurlingtonAsheboroKernersville
B · Relationships

How it relates to other codes

The codes 336 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?

Split from · 1997 910 Southeastern NC (Wilmington / Fayetteville) Created December 15, 1997 in a split of area code 910.
Overlay · 2015 743 Piedmont Triad (overlay) All-services overlay serving the same geography; permissive dialing began October 24, 2015.
What's changing. Overlaid by 743 across the same geography; 10-digit dialing mandatory.
C · History

How 336 got here

1997-12-15
Area code 336 created in a split of area code 910 for the Piedmont Triad region.
Source: Wikipedia
2015-10-24
Permissive 10-digit dialing began for the 336/743 overlay.
Source: Wikipedia
2016-04-23
Mandatory 10-digit dialing took effect in the 336/743 territory.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
800
Prefixes available
0
Thousands-blocks assigned
3,204

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

Compare 336 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.