Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS4IM callsign genealogy
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 KS4IM's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KS4IM.
- FRIESE JR, FRED EGAgranted 2024-05-17