Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4RXZ callsign genealogy
Currently held by AMMONS, CURTIS 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 KF4RXZ's current licensee, walking backwards.
- Ammons, Curtis SFLgranted 2010-04-29cancelled 2010-05-18
Successor callsigns
Callsigns held now by people who previously held KF4RXZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4RXZ, oldest first.
- AMMONS, CURTIS S FL1997-05-21 → cancelled 2009-05-22
- AMMONS, CURTIS S FL2020-05-11 active