Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4ZZY callsign genealogy
Currently held by McCloud, Ronald 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 KI4ZZY's current licensee, walking backwards.
- Hyman, IsraelAZgranted 2024-12-31cancelled 2025-01-18
Successor callsigns
Callsigns held now by people who previously held KI4ZZY.
- McCloud, Ronald DFLgranted 2007-11-27cancelled 2008-07-12
All historical holders
Every license row we've seen with the callsign KI4ZZY, oldest first.
- McCloud, Ronald D FL2007-10-22 → cancelled 2007-11-27
- Hyman, Israel AZ2025-01-18 active