K0SX
Active1x2District 0
Competitive callsign — 1 application filed with the FCC.
License HolderGREWE, STEVEN L
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationDelta, CO
Grant DateAug 8, 2026
Expiration DateNov 4, 2036
K0SX is a highly sought-after 1x2 format amateur radio callsign. The license is currently held by GREWE, STEVEN L in Delta, CO. 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 Ridout, Christopher W on Apr 17, 2019. K0SX has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ----- ... -..-
CW Weight: 33 units(Moderate)
Voice Phonetics
Kilo Zero Sierra X-ray
Readability: 7.5/10(High readability)
License History
- License RenewedAug 8, 2026
- Administrative Update AppliedJun 10, 2025
- Administrative Update AppliedJun 10, 2025
- Administrative Update AppliedJan 9, 2021
- License RenewedAug 10, 2016
- License RenewedAug 25, 2006
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Ridout, Christopher WFiled Apr 17, 2019DismissedFCC ↗