North American Numbers Source-cited · ownership disclosed
Area code
606
In service
United States · since 1955

Eastern Kentucky

Created in 1954 by splitting from 502, area code 606 serves the eastern part of Kentucky, largely within the Eastern Kentucky Coalfield. It remains the sole code for its region.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Eastern Kentucky
Type
geographic
Status
in service
In service since
1955
Projected exhaust
2035 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 606 is

Eastern Kentucky and the eastern half of south-central Kentucky, largely within the Eastern Kentucky Coalfield..

Communities served wholly or partly by 606:

AshlandSomersetLondonCorbinPikevilleHazardMiddlesboroMoreheadMaysville

Also serves Stanford, Greenup and Paintsville.

B · Relationships

How it relates to other codes

The codes 606 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 · 1954 502 Louisville / Frankfort Split from 502 in 1954.
Spawned · 1999 859 Lexington / Northern Kentucky Lexington / Northern Kentucky portion split off as 859 in 1999.
Related · 1999 270 Western Kentucky Adjacent to the west.
What's changing. No overlay; 606 remains the sole area code for its region, projected not to exhaust until approximately 2034.
C · History

How 606 got here

1954
Established via split from 502, covering all of eastern Kentucky west to Lexington and Northern Kentucky.
Source: Wikipedia
1999
Northwestern portion (Lexington and Northern Kentucky) split off as area code 859; 606 retained by rural east.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
668
Prefixes available
132
Thousands-blocks assigned
2,478

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

Compare 606 with another code →
Sources
Wikipedia ↗
Area code 606
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.