Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NN3SI callsign genealogy
Currently held by Smithsonian Amateur Radio Group
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by NN3SI's current licensee, walking backwards.
- KN4OAOcancelledSmithsonian Institution Amateur Radio GroupVAgranted 2018-07-23cancelled 2019-01-01
Successor callsigns
Callsigns held now by people who previously held NN3SI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NN3SI, oldest first.
- SMITHSONIAN INSTN NAT MUS AMER HSTRY MD2003-04-25 → cancelled 2015-07-07
- Smithsonian Amateur Radio Group DC2019-01-01 active