Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4ZAJ callsign genealogy
Currently held by Oberer, Rene
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 KO4ZAJ's current licensee, walking backwards.
- Oberer, ReneTNgranted 2020-11-16cancelled 2021-02-23
Successor callsigns
Callsigns held now by people who previously held KO4ZAJ.
No current licensee on record previously held this callsign.