Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5UJM callsign genealogy
Currently held by KIMBLE, RALPH J
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 W5UJM's current licensee, walking backwards.
- COX, JAMES RTXgranted 2005-06-13cancelled 2006-05-26
Successor callsigns
Callsigns held now by people who previously held W5UJM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5UJM, oldest first.
- KIMBLE, RALPH J TX1998-04-14 → cancelled 2006-05-05
- COX, JAMES R TX2026-03-12 active