Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4DMU callsign genealogy
Currently held by Leitsch, Joseph 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 K4DMU's current licensee, walking backwards.
- Upton, DaveNCgranted 2023-08-22cancelled 2023-09-23
Successor callsigns
Callsigns held now by people who previously held K4DMU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4DMU, oldest first.
- Leitsch, Joseph L KY2007-03-22 → cancelled 2015-12-05
- Upton, Dave NC2023-09-23 active