Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9GUL callsign genealogy
Currently held by Olfsson, Thomas J
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 KD9GUL'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 KD9GUL.
- Olofsson, Thomas JILgranted 2016-09-17