Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4SY callsign genealogy
Currently held by KONG, JIMAO
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 KZ4SY's current licensee, walking backwards.
- KONG, JIMAONCgranted 2025-03-28cancelled 2025-05-12
Successor callsigns
Callsigns held now by people who previously held KZ4SY.
No current licensee on record previously held this callsign.