Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WJ4UK callsign genealogy
Currently held by JOHNSON, THOMAS W
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 WJ4UK's current licensee, walking backwards.
- JOHNSON, THOMAS WKYgranted 2013-01-05cancelled 2015-10-20
- KD4MLLno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held WJ4UK.
No current licensee on record previously held this callsign.