Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WS1T callsign genealogy
Currently held by NIEHAUS, NICHOLAS T
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 WS1T's current licensee, walking backwards.
- Guldeman, Steven LOHgranted 2024-06-21cancelled 2025-12-09
Successor callsigns
Callsigns held now by people who previously held WS1T.
- NIEHAUS, NICHOLAS TWIgranted 2023-09-12cancelled 2023-10-03
All historical holders
Every license row we've seen with the callsign WS1T, oldest first.
- LAKE, RALPH W MA2011-04-28 → cancelled 2023-07-15
- NIEHAUS, NICHOLAS T WI2023-08-04 → cancelled 2023-09-12
- Guldeman, Steven L OH2025-12-09 active