Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD2U callsign genealogy
Currently held by CONANT, DONALD E
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 AD2U's current licensee, walking backwards.
- Hu, JianqingCAgranted 2003-07-10cancelled 2009-08-25
Successor callsigns
Callsigns held now by people who previously held AD2U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AD2U, oldest first.
- CONANT, DONALD E NY1997-10-31 → cancelled 1999-02-10
- Hu, Jianqing CA2019-07-27 active