Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4RIY callsign genealogy
Currently held by GRIFFIN JR, BILLY 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 KD4RIY'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 KD4RIY.
- GRIFFIN JR, BILLY DALgranted 2021-10-05