K6CLS
Active1x3District 6
Competitive callsign — 3 applications filed with the FCC.
License HolderSojourner, Cliff L
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationPalo Alto, CA
Grant DateJan 28, 2026
Expiration DateFeb 4, 2036
K6CLS is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Sojourner, Cliff L in Palo Alto, CA. This callsign has attracted significant interest in the amateur radio community, with 3 vanity applications filed with the FCC. The most recent was submitted by Cooper, Kent E on Jan 21, 2021. K6CLS has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -.... -.-. .-.. ...
CW Weight: 31 units(Moderate)
Voice Phonetics
Kilo Six Charlie Lima Sierra
Readability: 7.5/10(High readability)
License History
- License RenewedJan 28, 2026
- License RenewedNov 10, 2015
- Administrative Update AppliedSep 7, 2012
- License ModifiedMar 12, 2010
- License ModifiedOct 8, 2009
- License IssuedFeb 4, 2006
- Vanity Callsign GrantedFeb 4, 2006
Vanity Application Activity
Competing applications filed with the FCC for this callsign.