North American Numbers Source-cited · ownership disclosed
Area code
865
In service
United States · since 1999

Knoxville

Serves Knoxville and central East Tennessee; created in 1999 from a split of 423. The digits 865 spell "VOL" for the University of Tennessee Volunteers.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Knoxville
Type
geographic
Status
in service
In service since
1999
Projected exhaust
2046 Q4

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 865 is

Central East Tennessee — nine counties: Anderson, Blount, Grainger, Jefferson, Knox, Loudon, Roane, Sevier, and Union..

Communities served wholly or partly by 865:

KnoxvilleAlcoaMaryvilleOak RidgeSeviervillePigeon ForgeGatlinburg
B · Relationships

How it relates to other codes

The codes 865 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 · 1999 423 Chattanooga / Tri-Cities Split from 423; the split left 423 non-contiguous, with 865 nearly surrounded by two sections of 423.
What's changing. No overlay; ten-digit dialing required since Oct 24, 2021 (988 accommodation).
C · History

How 865 got here

1999-11-01
Area code 865 established via split of 423 for the Knoxville area; digits chosen to spell VOL.
Source: Wikipedia
2021-10-24
Transitioned to ten-digit dialing to accommodate the 988 hotline code.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
520
Prefixes available
280
Thousands-blocks assigned
2,788

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

Compare 865 with another code →
Sources
Wikipedia ↗
Area code 865
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.