Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4MDH callsign genealogy
Currently held by HAZELWOOD, MICHAEL 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 W4MDH's current licensee, walking backwards.
- HAZELRIGG, MICHAEL DKYgranted 2001-12-04cancelled 2006-01-10
Successor callsigns
Callsigns held now by people who previously held W4MDH.
- HAZELWOOD, MICHAEL DGAgranted 2022-03-09
All historical holders
Every license row we've seen with the callsign W4MDH, oldest first.
- HAZELWOOD, MICHAEL D GA2001-03-13 → cancelled 2002-03-28
- Hazelrigg, Michael D KY2026-02-12 active