Confidence: Medium · Source: FCC ULS · As of 2026-09-11
W7CSS callsign genealogy
Currently held by Wernli, Stefan
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 W7CSS's current licensee, walking backwards.
- Wernli, StefanFLgranted 2024-12-19cancelled 2025-12-23
Successor callsigns
Callsigns held now by people who previously held W7CSS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7CSS, oldest first.
- LOWERY, BYRON O FL2000-09-19 → cancelled 2012-09-20
- Wernli, Stefan FL2025-12-23 active