Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO2LSU callsign genealogy
Currently held by Mack, Jonathan D
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 KO2LSU's current licensee, walking backwards.
- Mack, Jonathan DALgranted 2020-10-02cancelled 2020-10-20
Successor callsigns
Callsigns held now by people who previously held KO2LSU.
No current licensee on record previously held this callsign.