NN3SI
Active2x2District 3
Competitive callsign — 1 application filed with the FCC.
License HolderSmithsonian Amateur Radio Group
Min. Class RequiredGeneral
LocationWashington, DC
Grant DateJan 1, 2019
Expiration DateJan 1, 2029
NN3SI is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by Smithsonian Amateur Radio Group in Washington, DC. 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 Smithsonian Institution Amateur Radio Group on Dec 13, 2018. NN3SI has 10 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-. -. ...-- ... ..
CW Weight: 22 units(Light (fast to send))
Voice Phonetics
November November Three Sierra India
Readability: 6/10(Good readability)
License History
- License ModifiedJul 10, 2026
- Administrative Update AppliedJan 26, 2024
- License ModifiedJan 11, 2024
- License ModifiedDec 15, 2023
- Administrative Update AppliedJun 7, 2019
- Vanity Callsign GrantedJan 1, 2019
- License IssuedJan 1, 2019
- License ExpiredJul 7, 2015
- License ModifiedMay 12, 2004
- License RenewedApr 25, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Smithsonian Institution Amateur Radio GroupFiled Dec 13, 2018Not awardedFCC ↗