Kentucky area codes — detailed data

NANPA NPA database, current as of July 28, 2026.

This page expands the state overview with per-code operational data from NANPA: parent codes, projected exhaust dates, dialing patterns and relief status for all 5 Kentucky codes.

Aggregate footprint: the state's 5 geographic codes currently carry 2,754 active NXX prefixes over 418 rate-center anchorings, with 1,943 prefixes in thousands-block pooling. 5 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 270 came out of 502 in 1999; 364 came out of 270 in 2014; 859 came out of 606 in 2000. The remaining codes (502, 606) date back to the plan's early assignments.

Dialing plans: 3 codes use plain ten-digit local dialing (10D); 2 still allow seven-digit local calls. Overlay territories always dial ten digits; the 2021 988-hotline transition moved most others to ten digits as well.

The tightest capacity in the state is 502, projected to exhaust 1Q 2029.

Status: 1 with relief planning in progress — details in the table.

Code-by-code notes

270 — spawned 364; carved from 502; overlaid by 364; exhaust forecast 3Q 2109; spans two time zones.

502 — spawned 270; overlaid by 761; exhaust forecast 1Q 2029.

606 — spawned 859; exhaust forecast 4Q 2035; spans two time zones.

859 — carved from 606; exhaust forecast 2Q 2059.

364 — carved from 270; overlaid by 270; exhaust forecast 3Q 2109; spans two time zones.

Time-zone note: 270, 364, 606 span two time zones — rare among NANP codes.