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KD4UPO

Available2x3District 4

No competing applications on record.

License HolderStringfield, Larry L

License ClassTechnician

Min. Class RequiredTechnician

LocationHouston, TX

Grant DateDec 22, 1992

Expiration DateDec 22, 2002

Cancellation DateDec 23, 2004

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KD4UPO

Available2x3District 4

No competing applications on record.

License HolderStringfield, Larry L

License ClassTechnician

Min. Class RequiredTechnician

LocationHouston, TX

Grant DateDec 22, 1992

Expiration DateDec 22, 2002

Cancellation DateDec 23, 2004

Available for ApplicationsDec 23, 2004

KD4UPO is a 2x3 format amateur radio callsign. It is currently registered to Stringfield, Larry L in Houston, TX. 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: 41 units(Heavy (slower to send))

Voice Phonetics

Kilo Delta Four Uniform Papa Oscar

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 ExpiredDec 23, 2004

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 Sep 3, 2026

Is KD4UPO Available? FCC Vanity Status & Watchlist