Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1ROK callsign genealogy
Currently held by Rice, Rudolph 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 K1ROK's current licensee, walking backwards.
- Kim, JohnCAgranted 2024-02-08cancelled 2024-03-01
Successor callsigns
Callsigns held now by people who previously held K1ROK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1ROK, oldest first.
- Rice, Rudolph R NC2005-06-20 → cancelled 2017-09-16
- Kim, John CA2024-03-01 active