K3SFO
Active1x3District 3
Competitive callsign — 7 applications filed with the FCC.
License HolderCarroux, Christopher L
License ClassTechnician
Min. Class RequiredGeneral
LocationSan Mateo, CA
Grant DateMar 24, 2026
Expiration DateMar 24, 2036
K3SFO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Carroux, Christopher L in San Mateo, CA. This callsign has attracted significant interest in the amateur radio community, with 7 vanity applications filed with the FCC. The most recent was submitted by Carroux, Christopher L on Mar 2, 2016. K3SFO has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ...-- ... ..-. ---
CW Weight: 34 units(Moderate)
Voice Phonetics
Kilo Three Sierra Foxtrot Oscar
Readability: 7.5/10(High readability)
License History
- License RenewedMar 24, 2026
- Administrative Update AppliedDec 27, 2023
- License IssuedMar 22, 2016
- Vanity Callsign GrantedMar 22, 2016
- License ExpiredOct 18, 2012
- Authorization PrintedMar 2, 2001
- Internal Duplicate RequestedMar 1, 2001
- Internal Correction AppliedDec 14, 2000
- License IssuedOct 17, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.