Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1RIS callsign genealogy
Currently held by YOON, RICHARD Y
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 KA1RIS's current licensee, walking backwards.
- Karis, Thomas AMAgranted 2024-05-11cancelled 2024-05-31
Successor callsigns
Callsigns held now by people who previously held KA1RIS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1RIS, oldest first.
- YOON, RICHARD Y MA1987-12-15 → cancelled 1999-12-16
- Karis, Thomas A MA2024-05-31 active