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KD4FSO

Available2x3District 4

No competing applications on record.

License HolderO NEILL, CHARLES

License ClassTechnician

Min. Class RequiredTechnician

LocationRIVERHEAD, NY

Grant DateAug 3, 1993

Expiration DateAug 3, 2003

Cancellation DateAug 4, 2005

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KD4FSO

Available2x3District 4

No competing applications on record.

License HolderO NEILL, CHARLES

License ClassTechnician

Min. Class RequiredTechnician

LocationRIVERHEAD, NY

Grant DateAug 3, 1993

Expiration DateAug 3, 2003

Cancellation DateAug 4, 2005

Available for ApplicationsAug 4, 2005

KD4FSO is a 2x3 format amateur radio callsign. It is currently registered to O NEILL, CHARLES in RIVERHEAD, NY. 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: 37 units(Moderate)

Voice Phonetics

Kilo Delta Four Foxtrot Sierra 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 ExpiredAug 4, 2005

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

QRZ ↗HamQTH ↗

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← KD4FSN KD4FSP →

FCC data as of Sep 3, 2026

Is KD4FSO Available? FCC Vanity Status & Watchlist