Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF7RB callsign genealogy
Currently held by Bertram, Ronald J
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 KF7RB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KF7RB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF7RB, oldest first.
- SHORTE, ADOLPH J WY1997-09-24 → cancelled 2005-05-12
- Bertram, Ronald J OR2026-06-02 active