Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4TRZ callsign genealogy
Currently held by Florida Portable Amateur Radio Klub
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 KO4TRZ'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 KO4TRZ.
- W4PRKactiveFlorida Portable Amateur Radio KlubFLgranted 2021-10-22