Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5COH callsign genealogy
Currently held by Yoo, Dongwon
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 K5COH's current licensee, walking backwards.
- Yoo, DongwonMAgranted 2023-07-11cancelled 2025-06-17
Successor callsigns
Callsigns held now by people who previously held K5COH.
No current licensee on record previously held this callsign.