Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4WTF callsign genealogy
Currently held by Fish, William T
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 KO4WTF's current licensee, walking backwards.
- Fish, William TSCgranted 2019-12-18cancelled 2020-01-24
Successor callsigns
Callsigns held now by people who previously held KO4WTF.
No current licensee on record previously held this callsign.