Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WJ6J callsign genealogy
Currently held by Sugiyama, Tatsuo
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 WJ6J's current licensee, walking backwards.
- Sugiyama, TatsuoMIgranted 2017-05-01cancelled 2017-05-23
Successor callsigns
Callsigns held now by people who previously held WJ6J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WJ6J, oldest first.
- Smith, Chas M CA2005-02-07 → cancelled 2017-05-05
- Sugiyama, Tatsuo CA2017-05-23 active