Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ9WTF callsign genealogy
Currently held by Wojcicki, Gregory
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 KZ9WTF's current licensee, walking backwards.
- Wojcicki, GregoryILgranted 2021-04-12cancelled 2021-05-18
Successor callsigns
Callsigns held now by people who previously held KZ9WTF.
No current licensee on record previously held this callsign.