Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WN1Y callsign genealogy
Currently held by Brown II, Michael G
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 WN1Y's current licensee, walking backwards.
- Brown II, Michael GMEgranted 2011-04-26cancelled 2013-05-21
Successor callsigns
Callsigns held now by people who previously held WN1Y.
- Shimizu, MasatoshiHIgranted 2021-02-23
All historical holders
Every license row we've seen with the callsign WN1Y, oldest first.
- CAVANAUGH, LEO F NH1998-07-07 → cancelled 2009-05-20
- Shimizu, Masatoshi HI2009-08-04 → cancelled 2011-04-19
- Brown II, Michael G ME2023-03-14 active