K4TNX
Active1x3District 4
Competitive callsign — 7 applications filed with the FCC.
License HolderCZEPCZYNSKI, ARTUR O
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationSUN PRAIRIE, WI
Grant DateAug 3, 2022
Expiration DateAug 7, 2032
K4TNX is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by CZEPCZYNSKI, ARTUR O in SUN PRAIRIE, WI. This callsign has attracted significant interest in the amateur radio community, with 7 vanity applications filed with the FCC. The most recent was submitted by Lesigues, Rommel on May 19, 2025. K4TNX has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- - -. -..-
CW Weight: 29 units(Light (fast to send))
Voice Phonetics
Kilo Four Tango November X-ray
Readability: 7.5/10(High readability)
License History
- License RenewedAug 3, 2022
- Administrative Update AppliedMay 2, 2019
- License ModifiedMar 20, 2015
- License IssuedAug 7, 2012
- Vanity Callsign GrantedAug 7, 2012
- License ExpiredJul 13, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.