Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9AAA callsign genealogy
Currently held by Chien, Feng-Yu
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 W9AAA's current licensee, walking backwards.
- Chien, Feng-YuMIgranted 2020-03-26cancelled 2020-04-24
Successor callsigns
Callsigns held now by people who previously held W9AAA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9AAA, oldest first.
- ANDERSON, DONALD L WI2008-08-28 → cancelled 2018-03-20
- Chien, Feng-Yu MI2020-04-24 active