K2RDX
Active1x3District 2
Competitive callsign — 1 application filed with the FCC.
License HolderMEZAK, JOHN A
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationSAN JOSE, CA
Grant DateDec 12, 2025
Expiration DateFeb 5, 2036
K2RDX is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by MEZAK, JOHN A in SAN JOSE, CA. 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, Aaron on Sep 2, 2026. K2RDX has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ..--- .-. -.. -..-
CW Weight: 36 units(Moderate)
Voice Phonetics
Kilo Two Romeo Delta X-ray
Readability: 7.5/10(High readability)
License History
- Administrative Update AppliedDec 15, 2025
- License RenewedDec 12, 2025
- License RenewedJan 11, 2016
- License RenewedNov 29, 2005
- FRN Association Letter SentMay 11, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Cook, AaronFiled Sep 2, 2026PendingFCC ↗