K4COS
Available1x3District 4
Competitive callsign — 3 applications filed with the FCC.
License HolderTUCKER, THOMAS A
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationLAS VEGAS, NV
Grant DateAug 18, 2020
Expiration DateNov 6, 2030
Cancellation DateMar 23, 2024
Available for ApplicationsMar 24, 2026
K4COS is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by TUCKER, THOMAS A in LAS VEGAS, NV. 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 VAUGHT, R C on Aug 26, 2014. K4COS has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -.-. --- ...
CW Weight: 34 units(Moderate)
Voice Phonetics
Kilo Four Charlie Oscar Sierra
Readability: 7.5/10(High readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (1x3).
License History
- License CanceledMar 23, 2024
- License RenewedAug 18, 2020
- Administrative Update AppliedSep 27, 2019
- Administrative Update AppliedNov 26, 2013
- Administrative Update AppliedMay 4, 2011
- License IssuedNov 6, 2010
- Vanity Callsign GrantedNov 6, 2010
Vanity Application Activity
Competing applications filed with the FCC for this callsign.