Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO4MDC callsign genealogy
Currently held by Corby, 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 KO4MDC's current licensee, walking backwards.
- Corby, Michael DFLgranted 2020-10-08cancelled 2020-12-29
Successor callsigns
Callsigns held now by people who previously held KO4MDC.
No current licensee on record previously held this callsign.