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KO4TTU

Available2x3District 4

No competing applications on record.

License HolderKrinn, Matthew N

License ClassTechnician

Min. Class RequiredTechnician

LocationRock Hill, SC

Grant DateOct 4, 2021

Expiration DateOct 4, 2031

Cancellation DateOct 22, 2021

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KO4TTU

Available2x3District 4

No competing applications on record.

License HolderKrinn, Matthew N

License ClassTechnician

Min. Class RequiredTechnician

LocationRock Hill, SC

Grant DateOct 4, 2021

Expiration DateOct 4, 2031

Cancellation DateOct 22, 2021

Available for ApplicationsOct 23, 2023

KO4TTU is a 2x3 format amateur radio callsign. It is currently registered to Krinn, Matthew N in Rock Hill, 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: 34 units(Moderate)

Voice Phonetics

Kilo Oscar Four Tango Tango Uniform

Readability: 7/10(Good readability)

This callsign is available now

Requires Technician license or higher to apply for this callsign format (2x3).

License History

License CanceledOct 22, 2021
Administrative Update AppliedOct 6, 2021
System-Generated GrantOct 4, 2021
License IssuedOct 4, 2021

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.

Search external databases

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FCC data as of Jul 10, 2026

Is KO4TTU Available? FCC Vanity Status & Watchlist