Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4MH callsign genealogy
Currently held by GIDUSKO SR, JOHN 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 W4MH's current licensee, walking backwards.
- Middleton, Brian EFLgranted 2016-05-10cancelled 2019-04-16
Successor callsigns
Callsigns held now by people who previously held W4MH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4MH, oldest first.
- GIDUSKO SR, JOHN E FL2007-02-27 → cancelled 2019-03-29
- Middleton, Brian E FL2019-04-16 active