Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4ROY callsign genealogy
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 KB4ROY's current licensee, walking backwards.
- DE LEON JR, ROGELIOTXgranted 2013-11-01cancelled 2017-11-07
Successor callsigns
Callsigns held now by people who previously held KB4ROY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4ROY, oldest first.
- DE LEON JR, ROGELIO TX2017-11-07 active
- ——