KJ4JDK
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderKonz, Jeffrey D
License ClassGeneral
Min. Class RequiredTechnician
LocationOshkosh, WI
Grant DateSep 15, 2017
Expiration DateSep 15, 2027
KJ4JDK is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Konz, Jeffrey D in Oshkosh, WI. 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 Konz, Jeffrey D on Aug 28, 2017. KJ4JDK has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .--- ....- .--- -.. -.-
CW Weight: 46 units(Heavy (slower to send))
Voice Phonetics
Kilo Juliet Four Juliet Delta Kilo
Readability: 6.5/10(Good readability)
License History
- Administrative Update AppliedMay 30, 2025
- License ModifiedOct 11, 2017
- Administrative Update AppliedSep 16, 2017
- License IssuedSep 15, 2017
- Vanity Callsign GrantedSep 15, 2017
- License CanceledMar 14, 2009
- License ModifiedFeb 23, 2009
- License IssuedJan 28, 2009
- System-Generated GrantJan 28, 2009
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Konz, Jeffrey DFiled Aug 28, 2017Not awardedFCC ↗