Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4UMR callsign genealogy
Currently held by KASEY III, THOMAS E
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 WB4UMR's current licensee, walking backwards.
- Kasey IV, Thomas EKYgranted 2003-07-02cancelled 2008-08-12
Successor callsigns
Callsigns held now by people who previously held WB4UMR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB4UMR, oldest first.
- KASEY III, THOMAS E KY1996-04-15 → cancelled 2008-04-16
- Kasey IV, Thomas E KY2018-05-18 active