Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ9TH callsign genealogy
Currently held by Helms, Troy
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 KZ9TH's current licensee, walking backwards.
- Helms, TroyALgranted 2022-11-23cancelled 2023-12-01
Successor callsigns
Callsigns held now by people who previously held KZ9TH.
No current licensee on record previously held this callsign.