Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4BJ callsign genealogy
Currently held by Frack, Michael 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 KM4BJ's current licensee, walking backwards.
- Frack, Michael JVAgranted 2025-03-04cancelled 2025-04-04
Successor callsigns
Callsigns held now by people who previously held KM4BJ.
- GARD JR, FRANCIS AVAgranted 2024-01-09
All historical holders
Every license row we've seen with the callsign KM4BJ, oldest first.
- GARD JR, FRANCIS A VA2007-09-26 → cancelled 2014-03-28
- Frack, Michael J VA2025-04-04 active