Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4DT callsign genealogy
Currently held by Thompson, David K
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 WB4DT's current licensee, walking backwards.
- Thompson, David KFLgranted 2001-01-08cancelled 2007-12-18
Successor callsigns
Callsigns held now by people who previously held WB4DT.
No current licensee on record previously held this callsign.