Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1OOL callsign genealogy
Currently held by Latzke, Gerald
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 K1OOL's current licensee, walking backwards.
- Latzke, GeraldILgranted 2025-02-20cancelled 2026-03-07
Successor callsigns
Callsigns held now by people who previously held K1OOL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1OOL, oldest first.
- BASS, CHESTER F CT1996-06-05 → cancelled 2008-06-06
- Latzke, Gerald IL2026-03-07 active