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NK4US

Available2x2District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderKAEFF JR, CHARLES N

License ClassAmateur Extra

Min. Class RequiredGeneral

LocationCOVINGTON, KY

Grant DateDec 4, 2015

Expiration DateDec 4, 2025

Cancellation DateFeb 17, 2016

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NK4US

Available2x2District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderKAEFF JR, CHARLES N

License ClassAmateur Extra

Min. Class RequiredGeneral

LocationCOVINGTON, KY

Grant DateDec 4, 2015

Expiration DateDec 4, 2025

Cancellation DateFeb 17, 2016

Available for ApplicationsFeb 18, 2018

NK4US is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by KAEFF JR, CHARLES N in COVINGTON, KY. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by McBroom Sr, Thomas W on Apr 4, 2022. NK4US has 3 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

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

Voice Phonetics

November Kilo Four Uniform Sierra

Readability: 6.5/10(Good readability)

This callsign is available now

Requires General license or higher to apply for this callsign format (2x2).

License History

License CanceledFeb 17, 2016
License IssuedDec 4, 2015
Vanity Callsign GrantedDec 4, 2015

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

McBroom Sr, Thomas WFiled Apr 4, 2022
DismissedFCC ↗
KAEFF JR, CHARLES NFiled Nov 16, 2015
Not awardedFCC ↗

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FCC data as of Jul 28, 2026

NK4US FCC Vanity Status: 2 Competing Applications & History