Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD0MTM callsign genealogy
Currently held by Study, Jason L
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 KD0MTM's current licensee, walking backwards.
- Daniels, MarvinKSgranted 2023-04-18cancelled 2024-03-26
Successor callsigns
Callsigns held now by people who previously held KD0MTM.
- Study, Jason LIAgranted 2020-07-08
All historical holders
Every license row we've seen with the callsign KD0MTM, oldest first.
- Study, Jason L IA2010-10-04 → cancelled 2014-08-05
- Daniels, Marvin KS2024-03-26 active