K4CB
Active1x2District 4
Competitive callsign — 65 applications filed with the FCC.
License HolderVierra, Tracy M
License ClassTechnician
Min. Class RequiredAmateur Extra
LocationSanta Clara, CA
Grant DateJan 13, 2018
Expiration DateJan 13, 2028
K4CB is a highly sought-after 1x2 format amateur radio callsign. The license is currently held by Vierra, Tracy M in Santa Clara, CA. This callsign has attracted significant interest in the amateur radio community, with 65 vanity applications filed with the FCC. The most recent was submitted by Brutus, Caleb on Aug 4, 2026. K4CB has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -.-. -...
CW Weight: 28 units(Light (fast to send))
Voice Phonetics
Kilo Four Charlie Bravo
Readability: 8.5/10(High readability)
License History
- License IssuedJan 13, 2018
- Vanity Callsign GrantedJan 13, 2018
- Internal Correction AppliedApr 22, 2016
- Internal Correction AppliedApr 22, 2016
- Administrative Update AppliedJul 17, 2007
- License RenewedJul 6, 2007
- Tax ID (TIN) AddedJul 2, 2007
Vanity Application Activity
Competing applications filed with the FCC for this callsign.