Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9RDJ callsign genealogy
Currently held by Johnson JR, Robert 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 K9RDJ's current licensee, walking backwards.
- Johnson Jr, Robert DTXgranted 2007-09-19cancelled 2007-10-10
Successor callsigns
Callsigns held now by people who previously held K9RDJ.
- Johnson Jr., Robert DTXgranted 2022-12-10cancelled 2023-03-21