Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1UI callsign genealogy
Currently held by Stahl, Nicholas D
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 N1UI's current licensee, walking backwards.
- Mei, GuobiaoMAgranted 2022-12-23cancelled 2023-02-07
Successor callsigns
Callsigns held now by people who previously held N1UI.
- Stahl, Nicholas DMIgranted 2021-01-19
All historical holders
Every license row we've seen with the callsign N1UI, oldest first.
- Leiden, Barbara G MA2013-06-19 → cancelled 2016-01-09
- Stahl, Nicholas D MI2019-10-18 → cancelled 2021-01-19
- Mei, Guobiao MA2023-02-07 active