Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9TDO callsign genealogy
Currently held by BTHSW Alumni ARC
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 KD9TDO's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KD9TDO.
- WA9TZWactiveBTHSW Alumni ARCILgranted 2021-08-17