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KO4ZSU

Available2x3District 4

No competing applications on record.

License HolderTROMBETTA, BERNARD H

License ClassGeneral

Min. Class RequiredTechnician

LocationTUCSON, AZ

Grant DateApr 15, 2022

Expiration DateApr 15, 2032

Cancellation DateMay 6, 2022

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KO4ZSU

Available2x3District 4

No competing applications on record.

License HolderTROMBETTA, BERNARD H

License ClassGeneral

Min. Class RequiredTechnician

LocationTUCSON, AZ

Grant DateApr 15, 2022

Expiration DateApr 15, 2032

Cancellation DateMay 6, 2022

Available for ApplicationsMay 7, 2024

KO4ZSU is a 2x3 format amateur radio callsign. It is currently registered to TROMBETTA, BERNARD H in TUCSON, AZ. 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: 39 units(Moderate)

Voice Phonetics

Kilo Oscar Four Zulu Sierra Uniform

Readability: 6.5/10(Good readability)

This callsign is available now

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

License History

License CanceledMay 6, 2022
Administrative Update AppliedApr 19, 2022
System-Generated GrantApr 15, 2022
License IssuedApr 15, 2022

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 10, 2026

Is KO4ZSU Available? FCC Vanity Status & Watchlist