Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9ZOG callsign genealogy
Currently held by HOLEVINSKY, HENRY K
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 N9ZOG's current licensee, walking backwards.
- Herzog, Robert DINgranted 2022-07-12cancelled 2022-07-30
Successor callsigns
Callsigns held now by people who previously held N9ZOG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9ZOG, oldest first.
- HOLEVINSKY, HENRY K IN2004-12-09 → cancelled 2016-12-22
- Herzog, Robert D IN2022-07-30 active