Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4AJB callsign genealogy
Currently held by Bettencourt, John
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 K4AJB's current licensee, walking backwards.
- Bettencourt, JohnFLgranted 2020-12-01cancelled 2021-03-09
Successor callsigns
Callsigns held now by people who previously held K4AJB.
- Barbour, Andrew JVAgranted 2022-10-01
All historical holders
Every license row we've seen with the callsign K4AJB, oldest first.
- Barbour, Andrew J VA2002-11-08 → cancelled 2003-01-17
- Bettencourt, John FL2021-03-09 active