Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4XDM callsign genealogy
Currently held by EARL, MICHAEL 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 K4XDM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4XDM.
No current licensee on record previously held this callsign.