Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4QN callsign genealogy
Currently held by SUNDERBRUCH, 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 K4QN's current licensee, walking backwards.
- SUNDERBRUCH, MICHAEL RFLgranted 1997-05-06cancelled 2002-03-07
- KE4RDCno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held K4QN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4QN, oldest first.
- MC CLELLAN, ROY C AL1989-11-07 → cancelled 2001-11-08
- SUNDERBRUCH, MICHAEL R FL2022-02-10 active