Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9QJU callsign genealogy
Currently held by KOSTKA, SHAUN P
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 KC9QJU's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KC9QJU.
- KOSTKA, SHAUN PILgranted 2019-09-04