Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4OSX callsign genealogy
Currently held by MALO, BRUCE R
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 KF4OSX's current licensee, walking backwards.
- KA1IVSno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KF4OSX.
- MALO, BRUCE RFLgranted 2017-06-10