Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9FXK callsign genealogy
Currently held by KACZYNSKI, FRANCIS X
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 K9FXK's current licensee, walking backwards.
- KACZYNSKI, FRANCIS XILgranted 2018-03-15cancelled 2018-04-17
Successor callsigns
Callsigns held now by people who previously held K9FXK.
No current licensee on record previously held this callsign.