Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8RWB callsign genealogy
Currently held by Gutzwiller, Florian
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 K8RWB's current licensee, walking backwards.
- Gutzwiller, FlorianNYgranted 2017-12-13cancelled 2018-09-07
Successor callsigns
Callsigns held now by people who previously held K8RWB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8RWB, oldest first.
- BYLER, ROBERT W MI2006-08-18 → cancelled 2018-08-21
- Gutzwiller, Florian NY2018-09-07 active