Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4ETS callsign genealogy
Currently held by Torres, Osvaldo
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 KO4ETS'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 KO4ETS.
- TORRES, OSVALDONCgranted 2020-09-15cancelled 2021-04-02