Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9DAM callsign genealogy
Currently held by Marshall, David 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 W9DAM's current licensee, walking backwards.
- Marshall, David AINgranted 2016-09-14cancelled 2018-09-08
Successor callsigns
Callsigns held now by people who previously held W9DAM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9DAM, oldest first.
- HARRIS, WILLIAM F IL2006-06-16 → cancelled 2018-07-25
- Marshall, David A IN2018-09-08 active