Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0TOY callsign genealogy
Currently held by THORNTON, THOMAS R
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 W0TOY's current licensee, walking backwards.
- THORNTON, THOMAS RIDgranted 2014-08-02cancelled 2017-12-08
Successor callsigns
Callsigns held now by people who previously held W0TOY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0TOY, oldest first.
- JARNEFELD, JOHN MN1989-05-02 → cancelled 2001-05-03
- THORNTON, THOMAS R ID2017-12-08 active