Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1TK callsign genealogy
Currently held by KUMAGAI, TAKASHI
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 N1TK's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N1TK.
No current licensee on record previously held this callsign.