Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4CZS callsign genealogy
Currently held by READINGER SR, DONALD J
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 KI4CZS's current licensee, walking backwards.
- READINGER SR, DONALD JSCgranted 2002-09-28cancelled 2003-11-20
Successor callsigns
Callsigns held now by people who previously held KI4CZS.
- READINGER SR, DONALD JSCgranted 2023-08-30