Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4WRE callsign genealogy
Currently held by ROBERTSON, MICHAEL W
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 KD4WRE's current licensee, walking backwards.
- Ludwig, Alfred CNJgranted 2022-05-10cancelled 2022-06-01
Successor callsigns
Callsigns held now by people who previously held KD4WRE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4WRE, oldest first.
- ROBERTSON, MICHAEL W VA1993-02-02 → cancelled 2005-02-03
- Ludwig, Alfred C NJ2022-06-01 active