Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KK6RF callsign genealogy
Currently held by STAMMERJOHAN, RICHARD 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 KK6RF's current licensee, walking backwards.
- Bordwell Jr, Robert CCAgranted 2006-02-04cancelled 2010-09-08
Successor callsigns
Callsigns held now by people who previously held KK6RF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KK6RF, oldest first.
- STAMMERJOHAN, RICHARD S CA1991-01-22 → cancelled 1999-10-08
- Bordwell Jr, Robert C CA2020-09-29 active