Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FSN callsign genealogy
Currently held by Busch, Christopher K
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 K4FSN's current licensee, walking backwards.
- BUSCH, CHRISTOPHER KNCgranted 2001-07-11cancelled 2002-09-13
Successor callsigns
Callsigns held now by people who previously held K4FSN.
- Busch, Christopher KNCgranted 2017-05-10