Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WN4MDN callsign genealogy
Currently held by Borkowski, Matt J
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 WN4MDN's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WN4MDN.
No current licensee on record previously held this callsign.