Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4REX callsign genealogy
Currently held by OSORIO, ANA M
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 KC4REX's current licensee, walking backwards.
- TRIPLETT, REX ANCgranted 2017-01-04cancelled 2020-12-15
Successor callsigns
Callsigns held now by people who previously held KC4REX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4REX, oldest first.
- OSORIO, ANA M CA1997-02-10 → cancelled 2004-05-13
- TRIPLETT, REX A NC2020-12-15 active