Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4MDD callsign genealogy
Currently held by HUTCHISON, WILLIAM W
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 W4MDD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4MDD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4MDD, oldest first.
- HUTCHISON, WILLIAM W NC2000-06-22 → cancelled 2012-09-05
- DOUGLAS, MICHAEL D FL2017-03-17 active