Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4IOU callsign genealogy
Currently held by INGRAM, SAM W
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 KF4IOU's current licensee, walking backwards.
- TORRES, ALFREDOFLgranted 2022-04-12cancelled 2022-04-30
Successor callsigns
Callsigns held now by people who previously held KF4IOU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4IOU, oldest first.
- INGRAM, SAM W TN1996-04-10 → cancelled 2008-04-11
- TORRES, ALFREDO FL2022-04-30 active