NA4CB
Active2x2District 4
Competitive callsign — 4 applications filed with the FCC.
License HolderKoyama, Katsuhiro
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationFort Pierce, FL
Grant DateMay 20, 2026
Expiration DateMay 20, 2036
NA4CB is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by Koyama, Katsuhiro in Fort Pierce, FL. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Boone, Carlton R on Feb 5, 2025. NA4CB has 2 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-. .- ....- -.-. -...
CW Weight: 29 units(Light (fast to send))
Voice Phonetics
November Alpha Four Charlie Bravo
Readability: 7.5/10(High readability)
License History
- System-Generated GrantMay 20, 2026
- License IssuedMay 20, 2026
Vanity Application Activity
Competing applications filed with the FCC for this callsign.