Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1SDS callsign genealogy
Currently held by VARNEY, SUSAN J
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 N1SDS's current licensee, walking backwards.
- Schaller, Seth DFLgranted 2020-11-17cancelled 2021-01-01
Successor callsigns
Callsigns held now by people who previously held N1SDS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1SDS, oldest first.
- VARNEY, SUSAN J ME1995-07-05 → cancelled 2006-07-08
- Schaller, Seth D FL2021-01-01 active