Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC9RJK callsign genealogy
Currently held by King, Robin J
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 KC9RJK's current licensee, walking backwards.
- King, Robin JINgranted 2012-02-17cancelled 2012-03-20
Successor callsigns
Callsigns held now by people who previously held KC9RJK.
- KEMPER, RONALD JINgranted 2015-07-30
All historical holders
Every license row we've seen with the callsign KC9RJK, oldest first.
- KEMPER, RONALD J IN2005-07-30 → cancelled 2005-09-07
- King, Robin J IN2012-03-20 → cancelled 2024-03-21