Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZPR callsign genealogy
Currently held by RUDDLE, Zack
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 K4ZPR's current licensee, walking backwards.
- RUDDLE, ZACKMNgranted 2025-01-29cancelled 2025-02-19
Successor callsigns
Callsigns held now by people who previously held K4ZPR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ZPR, oldest first.
- Chase, Nicholas FL2003-05-02 → cancelled 2015-05-05
- RUDDLE, Zack MN2025-02-19 active