Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4FDG callsign genealogy
Currently held by GRAHAM JR, FRANK 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 WB4FDG's current licensee, walking backwards.
- GRAHAM JR, FRANK DSCgranted 2017-09-18cancelled 2018-02-06
Successor callsigns
Callsigns held now by people who previously held WB4FDG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB4FDG, oldest first.
- TURK, DAVID H CA1990-09-04 → cancelled 2002-09-05
- GRAHAM JR, FRANK D SC2018-02-06 active