Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NT9G callsign genealogy
Currently held by Klaus, Jeffrey A
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 NT9G's current licensee, walking backwards.
- Klaus, Jeffrey AILgranted 2015-02-13cancelled 2024-03-19
Successor callsigns
Callsigns held now by people who previously held NT9G.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NT9G, oldest first.
- Brown, David M IN2012-02-28 → cancelled 2024-02-29
- Klaus, Jeffrey A IL2024-03-19 active