Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB9FDH callsign genealogy
Currently held by Backus, Stephen M
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 WB9FDH's current licensee, walking backwards.
- Backus, Stephen MINgranted 2014-07-17cancelled 2021-05-14
Successor callsigns
Callsigns held now by people who previously held WB9FDH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB9FDH, oldest first.
- WROBLEWSKI SR, ROBERT L IN2002-01-29 → cancelled 2014-04-22
- Backus, Stephen M IN2021-05-14 active