606
Area code
Statusin service
Introduced1955-01-01
JurisdictionKY, US
Local dialing7D
Time zoneEastern / Central
Last verified2026-09-17
Utilization 84.3% of assignable prefixes assigned
As of 09/17/2026
0%668 of ~792 assignable NXX values (200–999 excl. N11)100%
Prefix-level assignment does not equal number-level exhaustion; thousands-block pooling extends capacity. First assignment on record 2001-02-14, most recent 2026-09-10.
Area codes serve rate-center geographies, not municipal boundaries. “KY” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | NEW CINGULAR WIRELESS PCS, LLC - GA | 88 | 13.2% |
| 02 | ONVOY, LLC - KY | 79 | 11.8% |
| 03 | WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON | 74 | 11.1% |
| 04 | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 61 | 9.1% |
| 05 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY | 50 | 7.5% |
| 06 | WINDSTREAM KENTUCKY EAST, INC. - LONDON | 43 | 6.4% |
| 07 | EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS | 42 | 6.3% |
| 08 | LEVEL 3 COMMUNICATIONS, LLC - KY | 38 | 5.7% |
| 09 | POWERTEL KENTUCKY LICENSES, INC. | 22 | 3.3% |
| 10 | TWC IP ENABLED SERVICES, LLC | 19 | 2.8% |
Important: these are initial assignees from NANPA CO-code records — the carrier a prefix was originally assigned to. Because of number portability, the current serving carrier of any individual number may differ.
Change history
Recorded events for this NPA- 1955-01-01Area code 606 entered service.
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 1999-12-29 | PL-205 ↗ | 606 NPA Split, Creating 859 NPA - Kentucky |