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K4ASU

Active1x3District 4

Competitive callsign — 5 applications filed with the FCC.

License HolderHeinrich, Justin E

License ClassTechnician

Min. Class RequiredGeneral

LocationChapel Hill, NC

Grant DateSep 10, 2024

Expiration DateSep 10, 2034

K4ASU is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Heinrich, Justin E in Chapel Hill, NC. This callsign has attracted significant interest in the amateur radio community, with 5 vanity applications filed with the FCC. The most recent was submitted by Heinrich, Justin E on Jul 14, 2004. K4ASU has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 26 units(Light (fast to send))

Voice Phonetics

Kilo Four Alpha Sierra Uniform

Readability: 7/10(Good readability)

License History

License RenewedSep 10, 2024
License RenewedJul 11, 2014
License IssuedAug 3, 2004
Vanity Callsign GrantedAug 3, 2004

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Heinrich, Justin EFiled Jul 14, 2004
Not awardedFCC ↗
KOONCE, CURRUTHERSFiled May 24, 2004
Not awardedFCC ↗
UNDERWOOD, ANDREW SFiled Apr 8, 2002
Not awardedFCC ↗
COOPER, RANDALL SFiled Sep 1, 2000

Search external databases

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Explore nearby callsigns

← K4AST K4ASW →

FCC data as of Sep 3, 2026

Dismissed

UNDERWOOD, ANDREW SFiled Sep 1, 2000

DismissedFCC ↗

K4ASU FCC Vanity Status: 5 Competing Applications & History