North American Numbers Source-cited · ownership disclosed
Area code
984
In service
United States · since 2012

Research Triangle (overlay)

Area code 984 is an all-services overlay of area code 919 covering the Research Triangle. It became effective April 30, 2012.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Research Triangle (overlay)
Type
geographic
Status
in service
In service since
2012
Projected exhaust
2047 Q1

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 984 is

Same geography as 919: east-central NC Research Triangle, including Wake, Durham and Orange counties..

Communities served wholly or partly by 984:

RaleighDurhamCaryChapel Hill

Coextensive with 919; not tied to any single city.

B · Relationships

How it relates to other codes

The codes 984 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 · 2012 919 Research Triangle (Raleigh / Durham) 984 overlays the entire 919 numbering plan area (same geography, both sides).
What's changing. Overlay code over 919; not a standalone geography.
C · History

How 984 got here

2012-03-31
Mandatory 10-digit dialing took effect.
Source: Wikipedia
2012-04-30
Area code 984 overlay became effective.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
309
Prefixes available
491
Thousands-blocks assigned
2,770

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

Compare 984 with another code →
Sources
Wikipedia ↗
Area codes 919 and 984
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.