Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KU4BA callsign genealogy
Currently held by Mazzarella, Mario M
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 KU4BA's current licensee, walking backwards.
- Mazzarella, Mario MFLgranted 1997-01-27cancelled 2002-08-28
Successor callsigns
Callsigns held now by people who previously held KU4BA.
- Mazzarella, Mario MFLgranted 1997-01-27cancelled 2002-08-28
All historical holders
Every license row we've seen with the callsign KU4BA, oldest first.
- MAZZARELLA, MARIO M FL1997-01-27 → cancelled 2000-05-11
- Mazzarella, Mario M FL2012-06-01 → cancelled 2024-08-29