Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4BTB callsign genealogy
Currently held by CASSANOVA, WILLIAM A
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 N4BTB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N4BTB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4BTB, oldest first.
- Brooks III, Benjamine T AL2004-08-31 → cancelled 2016-09-01
- CASSANOVA, WILLIAM A GA2023-11-10 active