Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4UFR callsign genealogy
Currently held by Rivera, Michael A
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 KO4UFR'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 KO4UFR.
- Rivera, Michael ASCgranted 2021-10-21cancelled 2023-05-19