Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9RDR callsign genealogy
Currently held by Richter, 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 K9RDR's current licensee, walking backwards.
- Richter, Robert DILgranted 2010-11-30cancelled 2016-07-19
Successor callsigns
Callsigns held now by people who previously held K9RDR.
No current licensee on record previously held this callsign.