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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.

Ulmer, David HFiled Dec 5, 2025
DismissedFCC ↗
Ulmer, David HFiled Nov 25, 2025
Not awardedFCC ↗

Search external databases

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FCC data as of Sep 4, 2026

KR4UBW FCC Vanity Status: 2 Competing Applications & History