Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JHL callsign genealogy
Currently held by GULSVIG, DONALD W
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 K0JHL's current licensee, walking backwards.
- Leach, John HMOgranted 2020-10-29cancelled 2021-01-26
Successor callsigns
Callsigns held now by people who previously held K0JHL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0JHL, oldest first.
- GULSVIG, DONALD W MN2007-10-02 → cancelled 2019-12-17
- Leach, John H MO2021-01-26 active