Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9GBK callsign genealogy
Currently held by Kowalski Sr, George B
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 K9GBK's current licensee, walking backwards.
- Kowalski Sr, George BWIgranted 2025-11-21cancelled 2025-12-09
Successor callsigns
Callsigns held now by people who previously held K9GBK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9GBK, oldest first.
- KOWALSKI Mr., GEORGE B WI2005-08-26 → cancelled 2017-08-29
- Kowalski Sr, George B WI2025-12-09 active