Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9MW callsign genealogy
Currently held by WARRINGTON, MATTHEW D
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 AC9MW's current licensee, walking backwards.
- WARRINGTON, MATTHEW DILgranted 2015-06-17cancelled 2025-05-16
Successor callsigns
Callsigns held now by people who previously held AC9MW.
- Roth, Ronald WINgranted 2017-10-21
All historical holders
Every license row we've seen with the callsign AC9MW, oldest first.
- Roth, Ronald W IN2015-05-28 → cancelled 2017-10-21
- WARRINGTON, MATTHEW D IL2025-05-16 active