Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7TDS callsign genealogy
Currently held by SHIRK, THOMAS 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 W7TDS's current licensee, walking backwards.
- SHIRK, THOMAS DORgranted 2007-11-19cancelled 2007-12-18
Successor callsigns
Callsigns held now by people who previously held W7TDS.
- SHIRK, THOMAS DORgranted 2017-09-20