Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4M callsign genealogy
Currently held by Gutierrez., Roy J
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 KF4M's current licensee, walking backwards.
- GUTIERREZ, ROY JSCgranted 2018-01-17cancelled 2019-03-05
Successor callsigns
Callsigns held now by people who previously held KF4M.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4M, oldest first.
- LOVELACE, LESTER J TN2009-01-06 → cancelled 2016-12-29
- Gutierrez., Roy J SC2019-03-05 active