Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KO4DOC callsign genealogy
Currently held by Cueto, Sadoc
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 KO4DOC's current licensee, walking backwards.
- Cueto, SadocFLgranted 2021-06-29cancelled 2024-06-28
Successor callsigns
Callsigns held now by people who previously held KO4DOC.
- Kniss, William FTNgranted 2020-07-03cancelled 2020-12-01
All historical holders
Every license row we've seen with the callsign KO4DOC, oldest first.
- Kniss, William F TN2020-05-19 → cancelled 2020-07-03
- Cueto, Sadoc FL2024-06-28 active