Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1MDJ callsign genealogy
Currently held by Johnson, Matt D
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 W1MDJ's current licensee, walking backwards.
- Johnson, Matt DCTgranted 2012-05-26cancelled 2014-06-28
Successor callsigns
Callsigns held now by people who previously held W1MDJ.
No current licensee on record previously held this callsign.