Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0MHK callsign genealogy
Currently held by Klimek, Jon T
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 K0MHK's current licensee, walking backwards.
- Klimek, Jon TKSgranted 2016-12-06cancelled 2020-09-19
Successor callsigns
Callsigns held now by people who previously held K0MHK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0MHK, oldest first.
- Placzek, James F KS2008-02-04 → cancelled 2020-04-18
- Klimek, Jon T KS2020-09-19 active