Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9MTK callsign genealogy
Currently held by KNOUFF, MATTHEW 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 N9MTK's current licensee, walking backwards.
- KNOUFF, MATTHEW TINgranted 2016-03-04cancelled 2017-04-11
Successor callsigns
Callsigns held now by people who previously held N9MTK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9MTK, oldest first.
- EMERICK, CLARK A IL1991-10-01 → cancelled 2003-10-02
- KNOUFF, MATTHEW T IN2017-04-11 active