Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN9Z callsign genealogy
Currently held by BARRY, MICHAEL E
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 KN9Z's current licensee, walking backwards.
- KOETTER, THOMAS MWIgranted 2017-11-14cancelled 2022-01-21
Successor callsigns
Callsigns held now by people who previously held KN9Z.
- BARRY, MICHAEL EILgranted 2019-12-31
All historical holders
Every license row we've seen with the callsign KN9Z, oldest first.
- HOUGH, HELEN P TX1997-07-21 → cancelled 2009-07-22
- BARRY, MICHAEL E IL2011-11-08 → cancelled 2019-12-31
- KOETTER, THOMAS M WI2022-01-21 active