KS3U
Available2x1District 3
Competitive callsign — 2 applications filed with the FCC.
License HolderMAYRO, RONALD
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationARDMORE, PA
Grant DateMay 6, 2014
Expiration DateJul 27, 2024
Cancellation DateJul 29, 2026
Available for ApplicationsJul 28, 2026
KS3U is a highly sought-after 2x1 format amateur radio callsign. The license is currently held by MAYRO, RONALD in ARDMORE, PA. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by Nair, Arun M on Aug 7, 2026. KS3U has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ... ...-- ..-
CW Weight: 24 units(Light (fast to send))
Voice Phonetics
Kilo Sierra Three Uniform
Readability: 7.5/10(High readability)
This callsign is available now
Requires Amateur Extra license or higher to apply for this callsign format (2x1).
License History
- License ExpiredJul 29, 2026
- License RenewedMay 6, 2014
- License RenewedMay 14, 2004
- FRN Association Letter SentMay 14, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.