Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3TDS callsign genealogy
Currently held by SHAFER, MARSHALL 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 W3TDS's current licensee, walking backwards.
- DOERNER, JANICE ETXgranted 2015-08-26cancelled 2015-09-15
- KB0PQCno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held W3TDS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3TDS, oldest first.
- SHAFER, MARSHALL W TX1996-12-23 → cancelled 2008-12-24
- DOERNER, JANICE E TX2015-09-15 active