Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4WDA callsign genealogy
Currently held by Simpson, David J
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 KB4WDA's current licensee, walking backwards.
- Simpson, David JFLgranted 2021-12-09cancelled 2022-02-01
Successor callsigns
Callsigns held now by people who previously held KB4WDA.
No current licensee on record previously held this callsign.