Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB5SDU callsign genealogy
Currently held by CROLEY, BRAD 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 WB5SDU's current licensee, walking backwards.
- Croley, Bradley DTXgranted 2009-02-06cancelled 2009-02-28
Successor callsigns
Callsigns held now by people who previously held WB5SDU.
- Croley, Brad DTXgranted 2021-08-06
All historical holders
Every license row we've seen with the callsign WB5SDU, oldest first.
- CROLEY, BRAD D TX1988-09-06 → cancelled 2000-09-07
- Croley, Brad D TX2009-02-28 → cancelled 2011-07-15