KK4SR
Available2x2District 4
Competitive callsign — 1 application filed with the FCC.
License HolderUNDERWOOD, GEORGE W
License ClassAdvanced
Min. Class RequiredGeneral
LocationVERO BEACH, FL
Grant DateOct 1, 2008
Expiration DateOct 23, 2018
Cancellation DateOct 24, 2020
Available for ApplicationsOct 24, 2020
KK4SR is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by UNDERWOOD, GEORGE W in VERO BEACH, FL. This callsign has attracted significant interest in the amateur radio community, with 1 vanity application filed with the FCC. The most recent was submitted by Rumplik, Steven on Aug 18, 2025. KK4SR has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -.- ....- ... .-.
CW Weight: 29 units(Light (fast to send))
Voice Phonetics
Kilo Kilo Four Sierra Romeo
Readability: 7/10(Good readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (2x2).
License History
- License ExpiredOct 24, 2020
- License RenewedOct 1, 2008
- Tax ID (TIN) AddedNov 21, 2006
- Administrative Update AppliedNov 21, 2006
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Rumplik, StevenFiled Aug 18, 2025DismissedFCC ↗