Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0SDQ callsign genealogy
Currently held by Trapp, Brogan L
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 KC0SDQ's current licensee, walking backwards.
- Trapp, Brogan LPAgranted 2026-07-10cancelled 2026-07-28
Successor callsigns
Callsigns held now by people who previously held KC0SDQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC0SDQ, oldest first.
- Dickinson, Douglas R WA2024-03-05 → cancelled 2025-06-02
- Trapp, Brogan L PA2026-07-28 active