Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4TMO callsign genealogy
Currently held by Kirschner, Timo
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 K4TMO's current licensee, walking backwards.
- Kirschner, TimoGAgranted 2023-09-12cancelled 2023-12-22
Successor callsigns
Callsigns held now by people who previously held K4TMO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4TMO, oldest first.
- ARTEAGA, JOAQUIN B FL2003-12-03 → cancelled 2016-03-02
- Kirschner, Timo GA2023-12-22 active