Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MTU callsign genealogy
Currently held by Kneer, Ryan
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 K4MTU's current licensee, walking backwards.
- Kneer, RyanVAgranted 2025-04-18cancelled 2025-06-17
Successor callsigns
Callsigns held now by people who previously held K4MTU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MTU, oldest first.
- Urbano, Richard C TN2012-10-02 → cancelled 2024-10-03
- Kneer, Ryan VA2025-06-17 active