Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7MDW callsign genealogy
Currently held by COLLIANDER, MIKE A
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 W7MDW's current licensee, walking backwards.
- COLLIANDER, MIKE AORgranted 2014-09-04cancelled 2022-09-27
Successor callsigns
Callsigns held now by people who previously held W7MDW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7MDW, oldest first.
- Williamson, Maynard D OR2002-05-24 → cancelled 2014-05-28
- COLLIANDER, MIKE A OR2022-09-27 active