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KO4ZTX

Available2x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderThornton, George A

License ClassAmateur Extra

Min. Class RequiredTechnician

LocationSeattle, WA

Grant DateApr 15, 2022

Expiration DateApr 15, 2032

Cancellation DateMay 10, 2022

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KO4ZTX

Available2x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderThornton, George A

License ClassAmateur Extra

Min. Class RequiredTechnician

LocationSeattle, WA

Grant DateApr 15, 2022

Expiration DateApr 15, 2032

Cancellation DateMay 10, 2022

Available for ApplicationsMay 11, 2024

KO4ZTX is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Thornton, George A in Seattle, WA. This callsign has attracted significant interest in the amateur radio community, with 1 vanity application filed with the FCC. The most recent was submitted by BURNS, JOHN T on Sep 29, 2015. KO4ZTX has 3 recorded FCC license history events.

CW & Voice Analysis

Morse Code

-.- --- ....- --.. - -..-

CW Weight: 42 units(Heavy (slower to send))

Voice Phonetics

Kilo Oscar Four Zulu Tango X-ray

Readability: 7.5/10(High readability)

This callsign is available now

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

License History

License CanceledMay 10, 2022
System-Generated GrantApr 15, 2022
License IssuedApr 15, 2022

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

BURNS, JOHN TFiled Sep 29, 2015
DismissedFCC ↗

Search external databases

QRZ ↗HamQTH ↗

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← KO4ZTW KO4ZTY →

FCC data as of Sep 4, 2026

KO4ZTX FCC Vanity Status: 1 Competing Application & History