Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9JOP callsign genealogy
Currently held by DUFNER, CARL 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 WA9JOP'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 WA9JOP.
- DUFNER, CARL DMOgranted 2021-03-12