Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9AYS callsign genealogy
Currently held by Sibon, Douglas S
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 KC9AYS'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 KC9AYS.
- Sibon, Douglas SILgranted 2012-12-21cancelled 2019-06-22