Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4RTG callsign genealogy
Currently held by Etter, John 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 KF4RTG's current licensee, walking backwards.
- Etter, John WFLgranted 2021-01-14cancelled 2021-02-02
Successor callsigns
Callsigns held now by people who previously held KF4RTG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4RTG, oldest first.
- ETTER, JOHN W FL2007-05-07 → cancelled 2019-05-16
- Etter, John W FL2021-02-02 active