Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WI9SN callsign genealogy
Currently held by Niemann, Shawn L
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 WI9SN's current licensee, walking backwards.
- Niemann, Shawn LWIgranted 2023-09-06
Successor callsigns
Callsigns held now by people who previously held WI9SN.
- Niemann, Shawn LWIgranted 2023-09-06