Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA2UM callsign genealogy
Currently held by Wang, Chunpeng
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 AA2UM's current licensee, walking backwards.
- Wang, ChunpengWAgranted 2021-01-27cancelled 2021-03-16
Successor callsigns
Callsigns held now by people who previously held AA2UM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA2UM, oldest first.
- NERO SR, CELIO M NY1994-10-24 → cancelled 2003-02-13
- Wang, Chunpeng WA2021-03-16 active