Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4YT callsign genealogy
Currently held by Yoshikawa, Tetsuo
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 N4YT's current licensee, walking backwards.
- Drumm, Robert LGAgranted 2002-03-27cancelled 2009-06-26
Successor callsigns
Callsigns held now by people who previously held N4YT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4YT, oldest first.
- Yoshikawa, Tetsuo FL2007-04-18 → cancelled 2007-06-07
- DRUMM, ROBERT L GA2019-07-15 active