Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4AFX callsign genealogy
Currently held by Ruppe, Frederick C
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 KK4AFX's current licensee, walking backwards.
- Ruppe, Frederick CSCgranted 2010-12-20cancelled 2011-02-11
Successor callsigns
Callsigns held now by people who previously held KK4AFX.
- Ruppe, Frederick CTXgranted 2021-08-17