Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NN1SS callsign genealogy
Currently held by INTERNATIONAL SPACE STATION AMATEUR RADIO CLUB 3
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 NN1SS's current licensee, walking backwards.
- WEBSTER, JOHN SNHgranted 2006-07-11cancelled 2013-12-07
Successor callsigns
Callsigns held now by people who previously held NN1SS.
- K6DUEactiveINTERNATIONAL SPACE STATION AMATEUR RADIO CLUB 3MDgranted 2018-12-27
All historical holders
Every license row we've seen with the callsign NN1SS, oldest first.
- INTERNATIONAL SPACE STATION AMATEUR RADIO CLUB 3 MD2000-10-11 → cancelled 2009-01-16
- WEBSTER, JOHN S NH2023-12-28 active