Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8BAT callsign genealogy
Currently held by HAMLER, JOHN C
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 K8BAT's current licensee, walking backwards.
- Dornbos, AaronMIgranted 2025-11-21cancelled 2025-12-09
Successor callsigns
Callsigns held now by people who previously held K8BAT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8BAT, oldest first.
- HAMLER, JOHN C OH2013-07-12 → cancelled 2025-07-15
- Dornbos, Aaron MI2025-12-09 active