Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9MH callsign genealogy
Currently held by HEEBINK, MICHAEL R
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 W9MH's current licensee, walking backwards.
- Popa, NicolaeILgranted 2007-02-01cancelled 2008-05-17
Successor callsigns
Callsigns held now by people who previously held W9MH.
- HEEBINK, MICHAEL RWIgranted 2016-05-07
All historical holders
Every license row we've seen with the callsign W9MH, oldest first.
- BAUER, WILLIAM IL1988-08-16 → cancelled 2000-08-17
- HEEBINK, MICHAEL R WI2000-09-23 → cancelled 2006-04-28
- Popa, Nicolae IL2018-03-03 active