Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC5WDR callsign genealogy
Currently held by Ross, William D
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 KC5WDR's current licensee, walking backwards.
- Ross, William DTXgranted 2017-09-11cancelled 2018-08-31
Successor callsigns
Callsigns held now by people who previously held KC5WDR.
All historical holders
Every license row we've seen with the callsign KC5WDR, oldest first.
- Greiner Jr, David J NM2006-11-14 → cancelled 2007-11-09
- Ross, William D TX2018-08-31 → cancelled 2023-09-29