Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N7DOI callsign genealogy
Currently held by Doi, Takao
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 N7DOI's current licensee, walking backwards.
- Doi, TakaoTXgranted 2021-07-26cancelled 2021-08-24
Successor callsigns
Callsigns held now by people who previously held N7DOI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7DOI, oldest first.
- LARSEN, HAROLD A ID2008-09-09 → cancelled 2020-12-03
- Doi, Takao TX2021-08-24 active