Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7DFB callsign genealogy
Currently held by BROCKEL, DUANE F
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 K7DFB's current licensee, walking backwards.
- Bobko, David FWAgranted 2023-12-23cancelled 2024-01-23
Successor callsigns
Callsigns held now by people who previously held K7DFB.
- BROCKEL, DUANE FMTgranted 2025-03-08
All historical holders
Every license row we've seen with the callsign K7DFB, oldest first.
- BROCKEL, DUANE F MT2005-05-14 → cancelled 2015-04-11
- Bobko, David F WA2024-01-23 active