Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9JDI callsign genealogy
Currently held by Shimizu, Thomas M
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 N9JDI's current licensee, walking backwards.
- Shimizu, Thomas MILgranted 2020-07-27cancelled 2021-07-30
Successor callsigns
Callsigns held now by people who previously held N9JDI.
- SARAPATA, MARIE LCAgranted 2017-04-07
All historical holders
Every license row we've seen with the callsign N9JDI, oldest first.
- SARAPATA, MARIE L CA1999-11-23 → cancelled 2007-04-17
- Shimizu, Thomas M IL2021-07-30 active