Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9WN callsign genealogy
Currently held by CHAU, ALEXANDER M
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 N9WN's current licensee, walking backwards.
- CHAU, ALEXANDER MFLgranted 2022-08-12cancelled 2023-09-06
Successor callsigns
Callsigns held now by people who previously held N9WN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9WN, oldest first.
- KLEMM, MARVIN H IL2011-05-19 → cancelled 2023-08-12
- CHAU, ALEXANDER M FL2023-09-06 active