Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4BOS callsign genealogy
Currently held by Bosler, John E
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 KY4BOS's current licensee, walking backwards.
- Bosler, John EKYgranted 2023-02-25cancelled 2023-03-28
Successor callsigns
Callsigns held now by people who previously held KY4BOS.
No current licensee on record previously held this callsign.