Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9MH callsign genealogy
Currently held by Hoffmann, 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 AC9MH's current licensee, walking backwards.
- Hoffmann, Michael EWIgranted 2024-02-13cancelled 2026-03-07
Successor callsigns
Callsigns held now by people who previously held AC9MH.
- Weldon, Stephen AILgranted 2025-07-19
All historical holders
Every license row we've seen with the callsign AC9MH, oldest first.
- Weldon, Stephen A IL2015-09-10 → cancelled 2015-10-06
- Hoffmann, Michael E WI2026-03-07 active