Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9YMC callsign genealogy
Currently held by CHEN, YAWMING
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 K9YMC's current licensee, walking backwards.
- CHEN, YAW MINGCAgranted 2023-08-25cancelled 2023-09-12
- KB9IVNno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held K9YMC.
No current licensee on record previously held this callsign.