Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS4LEM callsign genealogy
Currently held by Salem, Yousef
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 KS4LEM's current licensee, walking backwards.
- Salem, YousefTXgranted 2020-06-24cancelled 2020-07-21
Successor callsigns
Callsigns held now by people who previously held KS4LEM.
No current licensee on record previously held this callsign.