K4COO
Active1x3District 4
Competitive callsign — 5 applications filed with the FCC.
License HolderVIRO, POLINA
License ClassGeneral
Min. Class RequiredGeneral
LocationBOX ELDER, SD
Grant DateJan 20, 2024
Expiration DateJan 20, 2034
K4COO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by VIRO, POLINA in BOX ELDER, SD. This callsign has attracted significant interest in the amateur radio community, with 5 vanity applications filed with the FCC. The most recent was submitted by Oliver, Xacharias L on Sep 14, 2026. K4COO has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -.-. --- ---
CW Weight: 40 units(Moderate)
Voice Phonetics
Kilo Four Charlie Oscar Oscar
Readability: 8/10(High readability)
License History
- License IssuedJan 20, 2024
- Vanity Callsign GrantedJan 20, 2024
- License ExpiredMay 6, 2021
- License RenewedMar 7, 2009
- Tax ID (TIN) AddedMar 6, 2009
Vanity Application Activity
Competing applications filed with the FCC for this callsign.