Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4DM callsign genealogy
Currently held by Mefford, David M
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 KY4DM's current licensee, walking backwards.
- Mefford, David MKYgranted 2015-05-13cancelled 2016-03-29
Successor callsigns
Callsigns held now by people who previously held KY4DM.
No current licensee on record previously held this callsign.