Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD1RT callsign genealogy
Currently held by THOMPSON, ROY 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 KD1RT's current licensee, walking backwards.
- THOMPSON, ROY WMAgranted 2016-02-02cancelled 2016-09-07
Successor callsigns
Callsigns held now by people who previously held KD1RT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD1RT, oldest first.
- DOYLE, PETER C NH2003-07-09 → cancelled 2015-10-06
- THOMPSON, ROY W MA2026-07-07 active