Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WU4Z callsign genealogy
Currently held by DRUMMOND, BOBBY D
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 WU4Z's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WU4Z.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WU4Z, oldest first.
- DRUMMOND, BOBBY D FL1989-02-28 → cancelled 2001-03-01
- Bastings, Mark S FL2021-03-25 active