Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0GEF callsign genealogy
Currently held by Geffre, Brian T
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 K0GEF's current licensee, walking backwards.
- Geffre, Brian TMNgranted 2014-10-10cancelled 2018-10-16
Successor callsigns
Callsigns held now by people who previously held K0GEF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0GEF, oldest first.
- WOODWORTH, LEONARD F MN1997-10-24 → cancelled 2009-10-27
- Geffre, Brian T MN2018-10-16 active