Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NS3F callsign genealogy
Currently held by SPENCER, LARS R
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 NS3F's current licensee, walking backwards.
- SPENCER, LARS RDEgranted 2004-07-27cancelled 2010-11-13
Successor callsigns
Callsigns held now by people who previously held NS3F.
- ADAMS, DAVID GCAgranted 2017-08-28
All historical holders
Every license row we've seen with the callsign NS3F, oldest first.
- SPENCER, LARS R DE2020-09-01 active
- ADAMS, DAVID G— → cancelled 1997-11-13