Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KR4MDF callsign genealogy
Currently held by Bertrand Jr, Leland E
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 KR4MDF's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KR4MDF.
- Bertrand Jr, Leland EVAgranted 2026-06-23