Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA7JDM callsign genealogy
Currently held by SNYDER, WILLIAM
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 WA7JDM's current licensee, walking backwards.
- Marshall, JohnCOgranted 2017-04-17cancelled 2017-05-05
Successor callsigns
Callsigns held now by people who previously held WA7JDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA7JDM, oldest first.
- SNYDER, WILLIAM AZ1995-09-11 → cancelled 2007-09-12
- Marshall, John CO2017-05-05 active