Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KB4DFZ callsign genealogy
Currently held by Sherwin, Raymond G
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 KB4DFZ's current licensee, walking backwards.
- Sherwin, RaymondFLgranted 2020-05-08cancelled 2020-05-29
Successor callsigns
Callsigns held now by people who previously held KB4DFZ.
- Sherwin, RaymondFLgranted 2020-11-17