Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO9B callsign genealogy
Currently held by Bakas, Sotirios
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 KO9B's current licensee, walking backwards.
- Bakas, SotiriosINgranted 2006-12-14cancelled 2010-11-02
Successor callsigns
Callsigns held now by people who previously held KO9B.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO9B, oldest first.
- PITTENGER JR, CHARLES R IN1988-09-20 → cancelled 2000-09-22
- Bakas, Sotirios IN2020-09-02 active