Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9BK callsign genealogy
Currently held by Krenkel, Robert W
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 KC9BK's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KC9BK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC9BK, oldest first.
- BELLEHUMEUR, GERALD C WI1996-04-22 → cancelled 2008-04-23
- Krenkel, Robert W WI2024-03-29 active