Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4ML callsign genealogy
Currently held by THULKE, HERMANN G
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 AC4ML's current licensee, walking backwards.
- LAVESPERE, MICHAEL RSCgranted 2016-07-19cancelled 2017-12-29
Successor callsigns
Callsigns held now by people who previously held AC4ML.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AC4ML, oldest first.
- THULKE, HERMANN G FL2002-01-17 → cancelled 2005-06-10
- LAVESPERE, MICHAEL R SC2017-12-29 active