Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3BAL callsign genealogy
Currently held by MARAZI, JOHN 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 W3BAL's current licensee, walking backwards.
- Heineman, AaronMDgranted 2025-07-08cancelled 2025-07-26
Successor callsigns
Callsigns held now by people who previously held W3BAL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3BAL, oldest first.
- MARAZI, JOHN C PA1995-09-28 → cancelled 2007-09-29
- Baltimore City Office Of Emergency Management MD2011-02-26 → cancelled 2023-02-28
- Heineman, Aaron T MD2025-07-26 active