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KX4UO

Available2x2District 4

No competing applications on record.

License HolderJohnson Jr, Harold E

License ClassAmateur Extra

Min. Class RequiredGeneral

LocationSEABROOK ISLAND, SC

Grant DateSep 17, 2019

Expiration DateSep 17, 2029

Cancellation DateOct 22, 2019

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KX4UO

Available2x2District 4

No competing applications on record.

License HolderJohnson Jr, Harold E

License ClassAmateur Extra

Min. Class RequiredGeneral

LocationSEABROOK ISLAND, SC

Grant DateSep 17, 2019

Expiration DateSep 17, 2029

Cancellation DateOct 22, 2019

Available for ApplicationsOct 23, 2021

KX4UO is a 2x2 format amateur radio callsign. It is currently registered to Johnson Jr, Harold E in SEABROOK ISLAND, SC. 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: 36 units(Moderate)

Voice Phonetics

Kilo X-ray Four Uniform Oscar

Readability: 7.5/10(High readability)

This callsign is available now

Requires General license or higher to apply for this callsign format (2x2).

License History

License CanceledOct 22, 2019
Administrative Update AppliedSep 19, 2019
System-Generated GrantSep 17, 2019
License IssuedSep 17, 2019

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.

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FCC data as of Jul 29, 2026

Is KX4UO Available? FCC Vanity Status & Watchlist