Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9KKK callsign genealogy
Currently held by Cline, Cory S
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 K9KKK's current licensee, walking backwards.
- Cline, Cory SMOgranted 2023-08-22cancelled 2023-09-09
Successor callsigns
Callsigns held now by people who previously held K9KKK.
- HOFFER, ROBERT JILgranted 2020-07-17
All historical holders
Every license row we've seen with the callsign K9KKK, oldest first.
- HOFFER, ROBERT J IL2018-12-11 → cancelled 2020-07-17
- Cline, Cory S MO2023-09-09 active