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KC4BY

Active2x2District 4

Competitive callsign — 4 applications filed with the FCC.

License HolderKurek, Matthew K

License ClassTechnician

Min. Class RequiredGeneral

LocationBoulder, CO

Grant DateJan 17, 2017

Expiration DateMar 13, 2027

KC4BY is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by Kurek, Matthew K in Boulder, CO. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Frost, Shaun W on Feb 21, 2007. KC4BY has 5 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 38 units(Moderate)

Voice Phonetics

Kilo Charlie Four Bravo Yankee

Readability: 8/10(High readability)

License History

License ModifiedApr 17, 2018
Administrative Update AppliedJan 18, 2017
License RenewedJan 17, 2017
License IssuedMar 13, 2007
Vanity Callsign GrantedMar 13, 2007

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Frost, Shaun WFiled Feb 21, 2007
Not awardedFCC ↗
KING COUNTY 4X4 RESCUE COUNCIL INCFiled Feb 21, 2007
Not awardedFCC ↗
GRAETER, PETER HFiled Jul 25, 2001
Not awardedFCC ↗
Tricoci, Anthony JFiled Jul 25, 2001

Search external databases

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Explore nearby callsigns

← KC4BW KC4BZ →

FCC data as of Sep 15, 2026

Not awardedFCC ↗

KC4BY FCC Vanity Status: 4 Competing Applications & History