Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC5RSX callsign genealogy
Currently held by DE LA ROSA, RUBEN
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 KC5RSX's current licensee, walking backwards.
- DeLaRosa, RubenTXgranted 2021-02-08cancelled 2021-02-27
Successor callsigns
Callsigns held now by people who previously held KC5RSX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC5RSX, oldest first.
- DE LA ROSA, RUBEN TX2005-10-06 → cancelled 2017-11-22
- DeLaRosa, Ruben TX2021-02-27 active