Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD2NJ callsign genealogy
Currently held by Xu, Tsz sum Michael
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 AD2NJ's current licensee, walking backwards.
- Xu, Tsz sum MichaelNYgranted 2026-06-02cancelled 2026-06-22
Successor callsigns
Callsigns held now by people who previously held AD2NJ.
- Xu, Tsz sum MichaelCAgranted 2026-07-10