Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0KZ callsign genealogy
Currently held by RATTERREE, ULYSSES E
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 W0KZ's current licensee, walking backwards.
- Schaumann, Jon PMOgranted 2006-03-29cancelled 2008-05-31
Successor callsigns
Callsigns held now by people who previously held W0KZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0KZ, oldest first.
- RATTERREE, ULYSSES E MO1997-08-21 → cancelled 1999-06-13
- Schaumann, Jon P MO2018-03-16 active