Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4DRZ callsign genealogy
Currently held by ZAK SR, DONALD R
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 K4DRZ's current licensee, walking backwards.
- ZACKEY, JACK CALgranted 2022-12-06cancelled 2023-01-21
Successor callsigns
Callsigns held now by people who previously held K4DRZ.
- MCLEAN, RYAN AFLgranted 2019-09-10
All historical holders
Every license row we've seen with the callsign K4DRZ, oldest first.
- ZAK SR, DONALD R FL2003-07-22 → cancelled 2015-07-23
- MCLEAN, RYAN A FL2019-05-03 → cancelled 2019-09-10
- ZACKEY, JACK C AL2023-01-21 active