Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4MD callsign genealogy
Currently held by Dunn, Matthew R
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 KM4MD's current licensee, walking backwards.
- Dunn, Matthew RGAgranted 2017-05-22cancelled 2018-09-29
Successor callsigns
Callsigns held now by people who previously held KM4MD.
No current licensee on record previously held this callsign.