Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4UD callsign genealogy
Currently held by SHARP, JACOB
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 KY4UD's current licensee, walking backwards.
- SHARP, JACOBALgranted 2022-09-20cancelled 2023-01-03
Successor callsigns
Callsigns held now by people who previously held KY4UD.
- SHARP, JACOBALgranted 2025-09-05