Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0COI callsign genealogy
Currently held by HALEY, JOHN M
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K0COI's current licensee, walking backwards.
- Lepinske, Jesse CCOgranted 2022-06-14cancelled 2026-02-14
Successor callsigns
Callsigns held now by people who previously held K0COI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0COI, oldest first.
- HALEY, JOHN M CO2012-12-01 → cancelled 2025-02-25
- Lepinske, Jesse C CO2026-02-14 active