Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4DZM callsign genealogy
Currently held by COOPER, CHARLES M
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 W4DZM's current licensee, walking backwards.
- Steadham, Michael RTNgranted 2020-01-24cancelled 2020-02-11
Successor callsigns
Callsigns held now by people who previously held W4DZM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4DZM, oldest first.
- COOPER, CHARLES M AL2005-12-13 → cancelled 2017-12-14
- Steadham, Michael R TN2020-02-11 active