Confidence: Medium · Source: FCC ULS · As of 2026-09-11
W4FST callsign genealogy
Currently held by THOMPSON, FREDERICK S
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 W4FST's current licensee, walking backwards.
- THOMPSON, FREDERICK SVAgranted 1996-04-15cancelled 2000-06-23
Successor callsigns
Callsigns held now by people who previously held W4FST.
No current licensee on record previously held this callsign.