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K4OTJ

Active1x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderMAHONEY, MICHAEL S

License ClassGeneral

Min. Class RequiredGeneral

LocationSHEPHERDSVILLE, KY

Grant DateApr 3, 2026

Expiration DateApr 19, 2036

K4OTJ is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by MAHONEY, MICHAEL S in SHEPHERDSVILLE, KY. 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 MAHONEY, MICHAEL S on Apr 1, 2016. K4OTJ has 3 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 36 units(Moderate)

Voice Phonetics

Kilo Four Oscar Tango Juliet

Readability: 7.5/10(High readability)

License History

License RenewedApr 3, 2026
License IssuedApr 19, 2016
Vanity Callsign GrantedApr 19, 2016

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

MAHONEY, MICHAEL SFiled Apr 1, 2016
Not awardedFCC ↗

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FCC data as of Sep 4, 2026

K4OTJ FCC Vanity Status: 1 Competing Application & History