Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WW4BM callsign genealogy
Currently held by Lee, Moon Joo
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 WW4BM's current licensee, walking backwards.
- Lee, Moon JooCAgranted 2018-06-18cancelled 2019-06-28
Successor callsigns
Callsigns held now by people who previously held WW4BM.
No current licensee on record previously held this callsign.