Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4UMK callsign genealogy
Currently held by Roanoke Digital Radio Experimenters Group
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 K4UMK's current licensee, walking backwards.
- KK4WDGcancelledRoanoke Digital Radio Experimenters GroupVAgranted 2024-01-18cancelled 2024-08-09
Successor callsigns
Callsigns held now by people who previously held K4UMK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4UMK, oldest first.
- ANDERSON SR, ROBERT E VA2003-10-10 → cancelled 2016-01-05
- Roanoke Digital Radio Experimenters Group VA2024-08-09 active