Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9DB callsign genealogy
Currently held by BRETL, DARRELL P
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 W9DB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W9DB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9DB, oldest first.
- BEYERSDORF, DANIEL F WI1997-06-17 → cancelled 1997-06-14
- BRETL, DARRELL P WI2010-04-02 → cancelled 2022-07-01
- OSWALD, MICHAEL S WI2022-07-19 active