K4SX
Active1x2District 4
Competitive callsign — 3 applications filed with the FCC.
License HolderLOWRANCE, RONALD D
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationWRIGHT CITY, MO
Grant DateSep 3, 2026
Expiration DateNov 4, 2036
K4SX is a highly sought-after 1x2 format amateur radio callsign. The license is currently held by LOWRANCE, RONALD D in WRIGHT CITY, MO. This callsign has attracted significant interest in the amateur radio community, with 3 vanity applications filed with the FCC. The most recent was submitted by Tineo, Jesus E on May 20, 2026. K4SX has 9 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- ... -..-
CW Weight: 25 units(Light (fast to send))
Voice Phonetics
Kilo Four Sierra X-ray
Readability: 8/10(High readability)
License History
- Administrative Update AppliedSep 3, 2026
- License RenewedSep 3, 2026
- Administrative Update AppliedFeb 24, 2026
- License RenewedAug 10, 2016
- Administrative Update AppliedJul 19, 2016
- License RenewedAug 10, 2006
- Administrative Update AppliedApr 21, 2006
- Administrative Update AppliedJul 6, 2000
- Administrative Update AppliedFeb 12, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.