Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF5FIV callsign genealogy
Currently held by Carrillo, Aaron S
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 KF5FIV's current licensee, walking backwards.
- Carrillo, Aaron STXgranted 2012-06-28cancelled 2014-02-14
Successor callsigns
Callsigns held now by people who previously held KF5FIV.
All historical holders
Every license row we've seen with the callsign KF5FIV, oldest first.
- HARWELL JR, KEIFFER G TX2010-03-08 → cancelled 2010-06-08
- Carrillo, Aaron S TX2014-02-14 → cancelled 2020-10-09