K4NXX
Active1x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderYOUNG, MARK J
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationFt. Worth, TX
Grant DateDec 11, 2017
Expiration DateJan 18, 2028
K4NXX is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by YOUNG, MARK J in Ft. Worth, TX. 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 Cecil, Jeremy D on Dec 31, 2007. K4NXX has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -. -..- -..-
CW Weight: 34 units(Moderate)
Voice Phonetics
Kilo Four November X-ray X-ray
Readability: 7.5/10(High readability)
License History
- Administrative Update AppliedApr 2, 2026
- License RenewedDec 11, 2017
- License ModifiedJan 21, 2014
- License ModifiedMar 19, 2009
- License IssuedJan 18, 2008
- Vanity Callsign GrantedJan 18, 2008
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Cecil, Jeremy DFiled Dec 31, 2007Not awardedFCC ↗