KU3H
Active2x1District 3
Competitive callsign — 7 applications filed with the FCC.
License HolderWallin, Mark J
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationPhiladelphia, PA
Grant DateAug 13, 2026
Expiration DateOct 25, 2036
KU3H is a highly sought-after 2x1 format amateur radio callsign. The license is currently held by Wallin, Mark J in Philadelphia, PA. 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 Clark, Mark A on Oct 24, 2016. KU3H has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ..- ...-- ....
CW Weight: 25 units(Light (fast to send))
Voice Phonetics
Kilo Uniform Three Hotel
Readability: 8/10(High readability)
License History
- License RenewedAug 13, 2026
- License IssuedOct 25, 2016
- Vanity Callsign GrantedOct 25, 2016
- License ExpiredOct 5, 2016
- Tax ID (TIN) AddedMay 31, 2005
- License RenewedMay 31, 2005
Vanity Application Activity
Competing applications filed with the FCC for this callsign.