Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7SYJ callsign genealogy
Currently held by Swanson, Byron K
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 W7SYJ's current licensee, walking backwards.
- Chinchilla Jr, Sergio AORgranted 2018-02-15cancelled 2018-03-06
Successor callsigns
Callsigns held now by people who previously held W7SYJ.
- Swanson, Byron KWAgranted 2020-07-24
All historical holders
Every license row we've seen with the callsign W7SYJ, oldest first.
- Swanson, Byron K WA2003-11-12 → cancelled 2010-10-15
- Chinchilla Jr, Sergio A OR2018-03-06 active