Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9ZAC callsign genealogy
Currently held by Doepker, Zackary J
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 N9ZAC's current licensee, walking backwards.
- Doepker, Zackary JINgranted 2021-08-16cancelled 2025-02-08
Successor callsigns
Callsigns held now by people who previously held N9ZAC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9ZAC, oldest first.
- MUMMERTZ, DOUGLAS J IL1994-11-01 → cancelled 2006-11-02
- Doepker, Zackary J IN2025-02-08 active