Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4MW callsign genealogy
Currently held by Wachenheim, Markus A
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 KD4MW's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KD4MW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4MW, oldest first.
- LESTER, SHERMAN J FL2010-05-11 → cancelled 2022-08-04
- Wachenheim, Markus A NY2026-02-10 active