Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4JLU callsign genealogy
Currently held by Sharpe, Alexander G
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 KO4JLU's current licensee, walking backwards.
- Sharpe, Alexander GFLgranted 2020-11-02cancelled 2020-11-18
Successor callsigns
Callsigns held now by people who previously held KO4JLU.
- Sharpe, Alexander GFLgranted 2020-11-02