Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JSK callsign genealogy
Currently held by MC GRIFF, MARTIN
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 K0JSK's current licensee, walking backwards.
- Kohles, Jason SVAgranted 2023-07-22cancelled 2023-08-11
Successor callsigns
Callsigns held now by people who previously held K0JSK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0JSK, oldest first.
- MC GRIFF, MARTIN IA1987-10-27 → cancelled 1999-10-28
- Kohles, Jason S VA2023-08-11 active