K4SU
Active1x2District 4
Competitive callsign — 15 applications filed with the FCC.
License HolderCass, Nathan A
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationMineral, VA
Grant DateJan 24, 2026
Expiration DateMar 14, 2036
K4SU is a highly sought-after 1x2 format amateur radio callsign. The license is currently held by Cass, Nathan A in Mineral, VA. This callsign has attracted significant interest in the amateur radio community, with 15 vanity applications filed with the FCC. The most recent was submitted by Auth, Thomas J on May 5, 2006. K4SU has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- ... ..-
CW Weight: 22 units(Light (fast to send))
Voice Phonetics
Kilo Four Sierra Uniform
Readability: 7.5/10(High readability)
License History
- License RenewedJan 24, 2026
- Administrative Update AppliedOct 19, 2024
- License RenewedMar 1, 2016
- License IssuedMar 14, 2006
- Vanity Callsign GrantedMar 14, 2006
- License ExpiredFeb 23, 2006
Vanity Application Activity
Competing applications filed with the FCC for this callsign.