Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4MCG callsign genealogy
Currently held by Giroux, Michael C
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 KB4MCG's current licensee, walking backwards.
- Giroux, Michael CNCgranted 2021-09-03cancelled 2021-09-21
Successor callsigns
Callsigns held now by people who previously held KB4MCG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4MCG, oldest first.
- MILLER JR, JAMES SC1994-10-19 → cancelled 2006-10-20
- Giroux, Michael C NC2021-09-21 active