Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WD4FZU callsign genealogy
Currently held by SCHRAMM, DONALD G
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 WD4FZU's current licensee, walking backwards.
- SCHRAMM, DONALD GFLgranted 2006-01-24cancelled 2006-02-22
Successor callsigns
Callsigns held now by people who previously held WD4FZU.
No current licensee on record previously held this callsign.