Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7DRT callsign genealogy
Currently held by COLE, WILLIAM R
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 W7DRT's current licensee, walking backwards.
- Tjossem, Donald RWAgranted 2007-10-15cancelled 2007-11-20
Successor callsigns
Callsigns held now by people who previously held W7DRT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7DRT, oldest first.
- COLE, WILLIAM R WA1987-12-29 → cancelled 1999-12-30
- Tjossem, Donald R WA2017-08-28 active