KB4CO
Cancelled2x2District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderO Neill, Carlos R
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationCollierville, TN
Grant DateMar 6, 2018
Cancellation DateOct 4, 2024
Available for ApplicationsOct 5, 2026
KB4CO is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by O Neill, Carlos R in Collierville, TN. 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 O Neill, Carlos R on Feb 16, 2018. KB4CO has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -... ....- -.-. ---
CW Weight: 37 units(Moderate)
Voice Phonetics
Kilo Bravo Four Charlie Oscar
Readability: 8/10(High readability)
Available Oct 5, 2026 (32 days remaining)
Requires General license or higher to apply for this callsign format (2x2).
License History
- License CanceledOct 4, 2024
- License IssuedMar 6, 2018
- Vanity Callsign GrantedMar 6, 2018
- License CanceledJan 10, 2006
- FRN Association Email SentOct 3, 2005
Vanity Application Activity
Competing applications filed with the FCC for this callsign.