Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC0DUA callsign genealogy
Currently held by SHAWLER, MARTIN W
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 KC0DUA's current licensee, walking backwards.
- Trausch, Jerold KIAgranted 2017-03-29cancelled 2018-03-06
Successor callsigns
Callsigns held now by people who previously held KC0DUA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC0DUA, oldest first.
- SHAWLER, MARTIN W IA2008-03-26 → cancelled 2017-01-26
- Trausch, Jerold K IA2018-03-06 active