Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4RDS callsign genealogy
Currently held by Spieler, Robert
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 KZ4RDS's current licensee, walking backwards.
- Spieler, RobertFLgranted 2022-03-23cancelled 2022-04-12
Successor callsigns
Callsigns held now by people who previously held KZ4RDS.
No current licensee on record previously held this callsign.