Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9MJH callsign genealogy
Currently held by Hummel, 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 KD9MJH's current licensee, walking backwards.
- Hummel, Michael JILgranted 2016-08-24cancelled 2016-09-17
Successor callsigns
Callsigns held now by people who previously held KD9MJH.
No current licensee on record previously held this callsign.