Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4MDM callsign genealogy
Currently held by Marange, Michael D
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 KZ4MDM's current licensee, walking backwards.
- Marange, Michael DFLgranted 2015-09-22cancelled 2015-10-14
Successor callsigns
Callsigns held now by people who previously held KZ4MDM.
No current licensee on record previously held this callsign.