KI4SX
Active2x2District 4
Competitive callsign — 1 application filed with the FCC.
License HolderCOOK, JERRY W
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationJACKSONVILLE, AL
Grant DateFeb 11, 2026
Expiration DateMar 1, 2036
KI4SX is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by COOK, JERRY W in JACKSONVILLE, AL. 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 COOK, JERRY W on Feb 11, 2016. KI4SX has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .. ....- ... -..-
CW Weight: 27 units(Light (fast to send))
Voice Phonetics
Kilo India Four Sierra X-ray
Readability: 7/10(Good readability)
License History
- Administrative Update AppliedFeb 13, 2026
- License RenewedFeb 11, 2026
- License ModifiedMar 15, 2017
- Vanity Callsign GrantedMar 1, 2016
- License IssuedMar 1, 2016
- License CanceledFeb 27, 2010
- License RenewedFeb 18, 2009
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- COOK, JERRY WFiled Feb 11, 2016Not awardedFCC ↗