K0SJ
Active1x2District 0
Competitive callsign — 4 applications filed with the FCC.
License HolderSTEVENS, JONATHAN H
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationOskaloosa, IA
Grant DateMay 12, 2017
Expiration DateMay 20, 2027
K0SJ is a highly sought-after 1x2 format amateur radio callsign. The license is currently held by STEVENS, JONATHAN H in Oskaloosa, IA. 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 John, Scott W on Sep 3, 2025. K0SJ has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ----- ... .---
CW Weight: 35 units(Moderate)
Voice Phonetics
Kilo Zero Sierra Juliet
Readability: 7/10(Good readability)
License History
- License RenewedMay 12, 2017
- License RenewedApr 12, 2007
- Administrative Update AppliedJun 25, 2005
- Administrative Update AppliedMar 14, 2002
Vanity Application Activity
Competing applications filed with the FCC for this callsign.