Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4ZS callsign genealogy
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 KI4ZS's current licensee, walking backwards.
- HAAG, DONALD LFLgranted 2022-01-10cancelled 2024-11-26
Successor callsigns
Callsigns held now by people who previously held KI4ZS.
- KVAMME, JAMES DNMgranted 2017-05-05
All historical holders
Every license row we've seen with the callsign KI4ZS, oldest first.
- HAAG, DONALD L TX2024-11-26 active
- —— → cancelled 1997-07-29