KR4UBW
Active2x3District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderUlmer, David H
License ClassTechnician
Min. Class RequiredTechnician
LocationHuntersville, NC
Grant DateDec 13, 2025
Expiration DateDec 13, 2035
KR4UBW is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Ulmer, David H in Huntersville, NC. 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 Ulmer, David H on Dec 5, 2025. KR4UBW has 2 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .-. ....- ..- -... .--
CW Weight: 37 units(Moderate)
Voice Phonetics
Kilo Romeo Four Uniform Bravo Whiskey
Readability: 6.5/10(Good readability)
License History
- License IssuedDec 13, 2025
- Vanity Callsign GrantedDec 13, 2025
Vanity Application Activity
Competing applications filed with the FCC for this callsign.