Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD6MJK callsign genealogy
Currently held by KRETCH JR, MICHAEL J
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 KD6MJK's current licensee, walking backwards.
- KRETCH JR, MICHAEL JCAgranted 2016-01-20cancelled 2016-02-06
Successor callsigns
Callsigns held now by people who previously held KD6MJK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD6MJK, oldest first.
- SANTIZO, MARIO CA1993-01-12 → cancelled 2005-01-13
- KRETCH JR, MICHAEL J CA2025-12-06 active