KN4MSW
Available2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderOTTE JR, JOHN R
License ClassTechnician
Min. Class RequiredTechnician
LocationMODESTO, CA
Grant DateJun 1, 2018
Expiration DateJun 1, 2028
Cancellation DateJun 26, 2018
Available for ApplicationsJun 27, 2020
KN4MSW is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by OTTE JR, JOHN R in MODESTO, 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 Weirich, Matthew S on Jan 2, 2026. KN4MSW has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- -. ....- -- ... .--
CW Weight: 34 units(Moderate)
Voice Phonetics
Kilo November Four Mike Sierra Whiskey
Readability: 7/10(Good readability)
This callsign is available now
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License CanceledJun 26, 2018
- System-Generated GrantJun 1, 2018
- License IssuedJun 1, 2018
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Weirich, Matthew SFiled Jan 2, 2026Not awardedFCC ↗