Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OAX callsign genealogy
Currently held by WU, YINAN
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 K4OAX's current licensee, walking backwards.
- WU, YINANTXgranted 2019-03-29cancelled 2019-04-19
Successor callsigns
Callsigns held now by people who previously held K4OAX.
No current licensee on record previously held this callsign.