Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4JDU callsign genealogy
Currently held by ULLREY, JOHN 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 W4JDU's current licensee, walking backwards.
- ULLREY, JOHN DSCgranted 2018-06-18cancelled 2018-07-10
Successor callsigns
Callsigns held now by people who previously held W4JDU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4JDU, oldest first.
- FUGATE, WOODROW W KY1998-08-19 → cancelled 2010-08-20
- ULLREY, JOHN D SC2018-07-10 active