Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4JTR callsign genealogy
Currently held by Jones Technical Research
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 WB4JTR's current licensee, walking backwards.
- KO4DXHcancelledJones Technical ResearchTNgranted 2020-06-02cancelled 2021-11-05
Successor callsigns
Callsigns held now by people who previously held WB4JTR.
- Jones, Lee JTNgranted 2019-10-16cancelled 2019-12-03
All historical holders
Every license row we've seen with the callsign WB4JTR, oldest first.
- Jones, Lee J TN2014-07-22 → cancelled 2019-10-16
- Jones Technical Research TN2021-11-05 active