Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD4FSY callsign genealogy
Currently held by ARNOLD JR, DONALD H
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 WD4FSY's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held WD4FSY.
- ARNOLD JR, DONALD HTNgranted 2025-08-19