Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7ZTZ callsign genealogy
Currently held by Wisnia, Randal
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 KC7ZTZ's current licensee, walking backwards.
- Wisnia, RandalORgranted 2022-05-04cancelled 2023-03-24
Successor callsigns
Callsigns held now by people who previously held KC7ZTZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC7ZTZ, oldest first.
- WISNIA, RANDY J OR2003-04-24 → cancelled 2014-11-27
- Wisnia, Randal OR2023-03-24 active