Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS4I callsign genealogy
Currently held by Jackson, Kenneth E
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 KS4I's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KS4I.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KS4I, oldest first.
- Jackson, Kenneth E SC2014-05-28 → cancelled 2026-07-16
- RENALDS, DOUGLAS C VA2026-08-04 active