Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD4DER callsign genealogy
Currently held by Bradley, John N
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 WD4DER's current licensee, walking backwards.
- BRADLEY, JOHN Ncancelled 1998-09-30
Successor callsigns
Callsigns held now by people who previously held WD4DER.
No current licensee on record previously held this callsign.