Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9FNX callsign genealogy
Currently held by Mach, Ryan
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 K9FNX's current licensee, walking backwards.
- Mach, RyanOKgranted 2019-04-23cancelled 2019-05-21
Successor callsigns
Callsigns held now by people who previously held K9FNX.
No current licensee on record previously held this callsign.