Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9BX callsign genealogy
Currently held by ROBERTS, RICHARD 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 K9BX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K9BX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9BX, oldest first.
- ROBERTS, RICHARD W WI2007-07-12 → cancelled 2010-11-15
- BIELSKI, STEVEN J IL2022-09-07 active