Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4MDU callsign genealogy
Currently held by DAVIS, REIS O
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 W4MDU's current licensee, walking backwards.
- DUNLAP, MICHAEL LGAgranted 2021-10-30cancelled 2026-09-04
Successor callsigns
Callsigns held now by people who previously held W4MDU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4MDU, oldest first.
- DAVIS, REIS O FL1995-03-30 → cancelled 2007-03-31
- DUNLAP, MICHAEL L GA2026-09-04 active