KO4AX
Available2x2District 4
Competitive callsign — 3 applications filed with the FCC.
License HolderBARON, LEONARD
License ClassAdvanced
Min. Class RequiredGeneral
LocationBOCA RATON, FL
Grant DateApr 30, 1991
Expiration DateApr 30, 2001
Cancellation DateMay 1, 2003
Available for ApplicationsMay 1, 2003
KO4AX is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by BARON, LEONARD in BOCA RATON, FL. 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 Moore, Charles A on May 11, 2026. KO4AX has 1 recorded FCC license history event.
CW & Voice Analysis
Morse Code
-.- --- ....- .- -..-
CW Weight: 35 units(Moderate)
Voice Phonetics
Kilo Oscar Four Alpha X-ray
Readability: 8/10(High readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (2x2).
License History
- License ExpiredMay 1, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.