Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NT6M callsign genealogy
Currently held by MENZ, JOHN 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 NT6M's current licensee, walking backwards.
- Dudzik, Michael ACAgranted 2002-06-25cancelled 2002-07-20
Successor callsigns
Callsigns held now by people who previously held NT6M.
- MENZ, JOHN ACAgranted 1998-07-15cancelled 2010-07-16
All historical holders
Every license row we've seen with the callsign NT6M, oldest first.
- Dudzik, Michael A WI2022-07-01 active
- MENZ, JOHN A— → cancelled 1998-07-15