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KX4SB

Active2x2District 4

Competitive callsign — 1 application filed with the FCC.

License HolderMILLER, CHARLES M

License ClassAmateur Extra

Min. Class RequiredGeneral

LocationSummerville, SC

Grant DateMay 16, 2019

Expiration DateMay 16, 2029

KX4SB is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by MILLER, CHARLES M in Summerville, SC. 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 Beard, Sandra C on Mar 22, 2010. KX4SB has 3 recorded FCC license history events.

CW & Voice Analysis

Morse Code

-.- -..- ....- ... -...

CW Weight: 31 units(Moderate)

Voice Phonetics

Kilo X-ray Four Sierra Bravo

Readability: 7.5/10(High readability)

License History

Administrative Update AppliedJan 12, 2021
System-Generated GrantMay 16, 2019
License IssuedMay 16, 2019

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Beard, Sandra CFiled Mar 22, 2010
Not awardedFCC ↗

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← KX4SA KX4SC →

FCC data as of Jul 29, 2026

KX4SB FCC Vanity Status: 1 Competing Application & History