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KC6ZIO

Available2x3District 6

No competing applications on record.

License HolderMayerhofer, John J

License ClassAmateur Extra

Min. Class RequiredTechnician

LocationOakland, CA

Grant DateAug 6, 1991

Expiration DateAug 6, 2001

Cancellation DateAug 7, 2003

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KC6ZIO

Available2x3District 6

No competing applications on record.

License HolderMayerhofer, John J

License ClassAmateur Extra

Min. Class RequiredTechnician

LocationOakland, CA

Grant DateAug 6, 1991

Expiration DateAug 6, 2001

Cancellation DateAug 7, 2003

Available for ApplicationsAug 7, 2003

KC6ZIO is a 2x3 format amateur radio callsign. It is currently registered to Mayerhofer, John J in Oakland, CA. 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 Charlie Six Zulu India 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 7, 2003

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 29, 2026

Is KC6ZIO Available? FCC Vanity Status & Watchlist