Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN9L callsign genealogy
Currently held by DATZMAN, ROBERT T
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 KN9L's current licensee, walking backwards.
- NAKATSUJI, KAZUMASUINgranted 2017-03-20cancelled 2019-02-05
Successor callsigns
Callsigns held now by people who previously held KN9L.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KN9L, oldest first.
- DATZMAN, ROBERT T IN2006-09-13 → cancelled 2018-12-11
- NAKATSUJI, KAZUMASU IN2019-02-05 active