Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WO1SFG callsign genealogy
Currently held by Machiela, Chad T
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 WO1SFG's current licensee, walking backwards.
- Machiela, Chad TWAgranted 2020-12-10cancelled 2023-05-19
Successor callsigns
Callsigns held now by people who previously held WO1SFG.
No current licensee on record previously held this callsign.