Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FQ callsign genealogy
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 K4FQ's current licensee, walking backwards.
- BABUIN, MICHAEL LNCgranted 1998-06-08cancelled 2001-01-20
Successor callsigns
Callsigns held now by people who previously held K4FQ.
- WANG, ROBERT CFLgranted 1998-12-30cancelled 2010-12-31
All historical holders
Every license row we've seen with the callsign K4FQ, oldest first.
- BABUIN, MICHAEL L NC2021-02-02 active
- —— → cancelled 1998-12-30