Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4JRC callsign genealogy
Currently held by Cain, James R
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 KO4JRC's current licensee, walking backwards.
- Cain, James RALgranted 2020-09-17cancelled 2020-10-06
Successor callsigns
Callsigns held now by people who previously held KO4JRC.
No current licensee on record previously held this callsign.