Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4UUM callsign genealogy
Currently held by Thompson, Jaime 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 KI4UUM's current licensee, walking backwards.
- Thompson, Jaime EFLgranted 2020-08-10cancelled 2020-08-28
Successor callsigns
Callsigns held now by people who previously held KI4UUM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KI4UUM, oldest first.
- Thompson, Jaime E FL2007-03-29 → cancelled 2019-03-30
- Thompson, Jaime E FL2020-08-28 active