Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1UMP callsign genealogy
Currently held by Kim, Taeuk
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 W1UMP's current licensee, walking backwards.
- Kim, TaeukMAgranted 2020-03-19cancelled 2020-06-13
Successor callsigns
Callsigns held now by people who previously held W1UMP.
No current licensee on record previously held this callsign.