Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4WD callsign genealogy
Currently held by NICHOLS SR, ROBERT M
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 KD4WD's current licensee, walking backwards.
- KM6RLGcancelledDiablo Four Wheelers Jeep Club IncCAgranted 2018-03-19cancelled 2018-04-10
Successor callsigns
Callsigns held now by people who previously held KD4WD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4WD, oldest first.
- NICHOLS SR, ROBERT M FL1993-01-12 → cancelled 2005-01-13
- Diablo Four Wheelers Jeep Club Inc CA2018-04-10 active