KN4SLF
Available2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderHilliard, Justin L
License ClassTechnician
Min. Class RequiredTechnician
LocationLouisville, KY
Grant DateFeb 15, 2019
Expiration DateFeb 15, 2029
Cancellation DateMar 26, 2019
Available for ApplicationsMar 27, 2021
KN4SLF is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Hilliard, Justin L in Louisville, KY. This callsign has attracted significant interest in the amateur radio community, with 1 vanity application filed with the FCC. The most recent was submitted by Ferguson, Scott L on Nov 20, 2025. KN4SLF has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -. ....- ... .-.. ..-.
CW Weight: 33 units(Moderate)
Voice Phonetics
Kilo November Four Sierra Lima Foxtrot
Readability: 6.5/10(Good readability)
This callsign is available now
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License CanceledMar 26, 2019
- System-Generated GrantFeb 15, 2019
- License IssuedFeb 15, 2019
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Ferguson, Scott LFiled Nov 20, 2025Not awardedFCC ↗