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KK6DUF

Available2x3District 6

Competitive callsign — 1 application filed with the FCC.

License HolderSiess, Matthew A

License ClassGeneral

Min. Class RequiredTechnician

LocationWest Hills, CA

Grant DateApr 23, 2013

Expiration DateApr 23, 2023

Cancellation DateJun 25, 2013

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KK6DUF

Available2x3District 6

Competitive callsign — 1 application filed with the FCC.

License HolderSiess, Matthew A

License ClassGeneral

Min. Class RequiredTechnician

LocationWest Hills, CA

Grant DateApr 23, 2013

Expiration DateApr 23, 2023

Cancellation DateJun 25, 2013

Available for ApplicationsJun 26, 2015

KK6DUF is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Siess, Matthew A in West Hills, CA. 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 Duffen, Scott on Jan 31, 2013. KK6DUF has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 37 units(Moderate)

Voice Phonetics

Kilo Kilo Six Delta Uniform Foxtrot

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 CanceledJun 25, 2013
License ModifiedMay 31, 2013
System-Generated GrantApr 23, 2013
License IssuedApr 23, 2013

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Duffen, ScottFiled Jan 31, 2013
Not awardedFCC ↗

Search external databases

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FCC data as of Jul 31, 2026

KK6DUF FCC Vanity Status: 1 Competing Application & History