Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1WSO callsign genealogy
Currently held by Filecco III, Thomas P
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 W1WSO's current licensee, walking backwards.
- FILECCO III, THOMAS PCTgranted 2018-06-02cancelled 2018-11-14
Successor callsigns
Callsigns held now by people who previously held W1WSO.
- FILECCO III, THOMAS PCTgranted 2018-06-02cancelled 2018-11-14
All historical holders
Every license row we've seen with the callsign W1WSO, oldest first.
- FILECCO III, THOMAS P WY2011-02-01 → cancelled 2018-06-02
- Filecco III, Thomas P CT2018-11-14 active