Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT4OU callsign genealogy
Currently held by Williston, Frederick F
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 KT4OU's current licensee, walking backwards.
- KF5NYno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KT4OU.
- Williston, Frederick FSCgranted 1996-04-24cancelled 2003-12-05