KD4UOI
Available2x3District 4
No competing applications on record.
License HolderWhitehead, Billy S
License ClassAmateur Extra
Min. Class RequiredTechnician
LocationBoulder, CO
Grant DateApr 11, 2013
Expiration DateJun 15, 2023
Cancellation DateJun 17, 2025
Available for ApplicationsJun 16, 2025
KD4UOI is a 2x3 format amateur radio callsign. It is currently registered to Whitehead, Billy S in Boulder, CO. There are currently no competing vanity applications or pending FCC filings on record for this callsign. Add it to your watchlist to receive an immediate alert if another operator files a vanity application.
CW & Voice Analysis
Morse Code
-.- -.. ....- ..- --- ..
CW Weight: 35 units(Moderate)
Voice Phonetics
Kilo Delta Four Uniform Oscar India
Readability: 6.5/10(Good readability)
This callsign is available now
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License ExpiredJun 17, 2025
- License ModifiedFeb 25, 2020
- License RenewedApr 11, 2013
- Tax ID (TIN) AddedMar 17, 2003
- License RenewedMar 17, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
No competing applications on record. Verify on the FCC ULS application search before filing.