Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9HTR callsign genealogy
Currently held by Rettke, Grant
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 KD9HTR'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 KD9HTR.
- RETTKE, GRANTWIgranted 2017-02-18cancelled 2017-04-01