Confidence: Medium · Source: FCC ULS · As of 2026-09-15
WX4GSM callsign genealogy
Currently held by BIELAWSKI, THOMAS F
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 WX4GSM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WX4GSM.
No current licensee on record previously held this callsign.