Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6MDX callsign genealogy
Currently held by BALDWIN, THOMAS H
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 W6MDX's current licensee, walking backwards.
- BALDWIN, THOMAS HCAgranted 2000-04-22cancelled 2007-08-24
- KI6PQno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held W6MDX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6MDX, oldest first.
- KIVENSON, GILBERT CA1995-02-21 → cancelled 2007-02-22
- BALDWIN, THOMAS H CA2017-07-10 active