North American Numbers Source-cited · ownership disclosed
Area code
931
In service
United States · since 1997

Clarksville / Columbia

Serves the outer ring of Middle Tennessee surrounding the Nashville metro, including Clarksville, Columbia, Cookeville and Tullahoma. Created in 1997 as a split from 615; no overlay.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Clarksville / Columbia
Type
geographic
Status
in service
In service since
1997
Projected exhaust
2051 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 931 is

Outer Middle Tennessee wrapping around the Nashville 615/629 core..

Communities served wholly or partly by 931:

ClarksvilleColumbiaCookevilleTullahomaLawrenceburgSpringfieldWaverlyFayetteville

Forms a horseshoe around the Nashville metropolitan area.

B · Relationships

How it relates to other codes

The codes 931 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 615 Nashville Split from 615 in 1997, taking the outer Middle Tennessee counties around Nashville.
What's changing. No overlay; single area code for its region.
C · History

How 931 got here

1997-09
Created as a split from 615, serving the outer ring of Middle Tennessee.
Source: Wikipedia
2021-10-24
Transitioned to ten-digit dialing (988 hotline accommodation).
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
563
Prefixes available
237
Thousands-blocks assigned
2,390

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

Compare 931 with another code →
Sources
Wikipedia ↗
Area code 931
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.