Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ4OSX callsign genealogy
Currently held by Sarasota Military Academy Amateur Radio Club
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 KJ4OSX's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KJ4OSX.
- W4SMAactiveSarasota Military Academy Amateur Radio ClubFLgranted 2021-02-04