Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD1ZR callsign genealogy
Currently held by PRENDERGAST JR, RONALD W
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 KD1ZR'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 KD1ZR.
- PRENDERGAST JR, RONALD WMAgranted 2019-02-02