Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9GWT callsign genealogy
Currently held by ROSNER, WILLIAM J
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 W9GWT's current licensee, walking backwards.
- THOMAS JR, GARY WWIgranted 2018-05-09cancelled 2018-07-17
Successor callsigns
Callsigns held now by people who previously held W9GWT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9GWT, oldest first.
- ROSNER, WILLIAM J FL1994-09-14 → cancelled 2006-09-15
- THOMAS JR, GARY W WI2018-07-17 active