Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR4LSU callsign genealogy
Currently held by Ball, Jack S
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 KR4LSU's current licensee, walking backwards.
- Ball, Jack SVAgranted 2025-12-03cancelled 2025-12-23
Successor callsigns
Callsigns held now by people who previously held KR4LSU.
No current licensee on record previously held this callsign.