Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4BB callsign genealogy
Currently held by Zapatka, Matthias
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 AJ4BB's current licensee, walking backwards.
- Zapatka, MatthiasALgranted 2003-05-08cancelled 2007-08-01
Successor callsigns
Callsigns held now by people who previously held AJ4BB.
No current licensee on record previously held this callsign.