Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4DMX callsign genealogy
Currently held by HARRISON, MATTHEW 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 W4DMX's current licensee, walking backwards.
- HARRISON, MATTHEW RNCgranted 2014-12-03cancelled 2016-12-02
Successor callsigns
Callsigns held now by people who previously held W4DMX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4DMX, oldest first.
- EIDSON JR, HERBERT G NC1995-07-31 → cancelled 2007-08-01
- HARRISON, MATTHEW R NC2016-12-02 active