Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4MDR callsign genealogy
Currently held by BACA, JULIO C
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 KC4MDR's current licensee, walking backwards.
- Radliff, Miles DFLgranted 2026-05-19cancelled 2026-06-06
Successor callsigns
Callsigns held now by people who previously held KC4MDR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4MDR, oldest first.
- BACA, JULIO C FL1989-08-29 → cancelled 2001-08-30
- Radliff, Miles D FL2026-06-06 active