Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0SIG callsign genealogy
Currently held by BUTLER, ROY A
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 W0SIG's current licensee, walking backwards.
- Vetter, Alfred TSDgranted 2026-04-29cancelled 2026-05-19
Successor callsigns
Callsigns held now by people who previously held W0SIG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0SIG, oldest first.
- BUTLER, ROY A MO2010-08-13 → cancelled 2022-11-04
- Vetter, Alfred T SD2026-05-19 active