Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4BAI callsign genealogy
Currently held by Bai, Mario
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 N4BAI's current licensee, walking backwards.
- Bai, MarioFLgranted 2024-06-28cancelled 2024-07-23
Successor callsigns
Callsigns held now by people who previously held N4BAI.
No current licensee on record previously held this callsign.