Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5ATC callsign genealogy
Currently held by Wisener, Donald L
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 N5ATC's current licensee, walking backwards.
- He, XiaochenMSgranted 2025-07-01cancelled 2025-07-19
Successor callsigns
Callsigns held now by people who previously held N5ATC.
- Buettner, StephanGUgranted 2011-05-17cancelled 2020-12-22
All historical holders
Every license row we've seen with the callsign N5ATC, oldest first.
- Buettner, Stephan GU2010-01-09 → cancelled 2011-05-17
- Wisener, Donald L TX2013-06-07 → cancelled 2025-06-10
- He, Xiaochen MS2025-07-19 active