Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4VJZ callsign genealogy
Currently held by Schiefer Jr, Robb
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 KO4VJZ's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KO4VJZ.
- Schiefer Jr, RobbALgranted 2022-01-05cancelled 2026-03-24