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KJ4UDR

Available2x3District 4

No competing applications on record.

License HolderKnappenberger, Jason T

License ClassGeneral

Min. Class RequiredTechnician

LocationOrlando, FL

Grant DateApr 13, 2010

Expiration DateApr 13, 2020

Cancellation DateMay 28, 2010

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KJ4UDR

Available2x3District 4

No competing applications on record.

License HolderKnappenberger, Jason T

License ClassGeneral

Min. Class RequiredTechnician

LocationOrlando, FL

Grant DateApr 13, 2010

Expiration DateApr 13, 2020

Cancellation DateMay 28, 2010

Available for ApplicationsMay 29, 2012

KJ4UDR is a 2x3 format amateur radio callsign. It is currently registered to Knappenberger, Jason T in Orlando, FL. 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 Juliet Four Uniform Delta Romeo

Readability: 6/10(Good readability)

This callsign is available now

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

License History

License CanceledMay 28, 2010
License ModifiedMay 14, 2010
System-Generated GrantApr 13, 2010
License IssuedApr 13, 2010

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 28, 2026

Is KJ4UDR Available? FCC Vanity Status & Watchlist