K4LFL
Active1x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderSHEFFIELD, MARK E
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationCharlotte, NC
Grant DateFeb 14, 2020
Expiration DateFeb 14, 2030
K4LFL is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by SHEFFIELD, MARK E in Charlotte, NC. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by The Leffell School Radio Club on Jan 5, 2026. K4LFL has 2 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- .-.. ..-. .-..
CW Weight: 32 units(Moderate)
Voice Phonetics
Kilo Four Lima Foxtrot Lima
Readability: 8/10(High readability)
License History
- License IssuedFeb 14, 2020
- Vanity Callsign GrantedFeb 14, 2020
Vanity Application Activity
Competing applications filed with the FCC for this callsign.