Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO6KO callsign genealogy
Currently held by BURNS, HARRY L
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 KO6KO's current licensee, walking backwards.
- Kim, Man SeokCAgranted 2024-10-16cancelled 2025-08-08
Successor callsigns
Callsigns held now by people who previously held KO6KO.
- PFEIFFER, MIKETXgranted 2025-12-10
All historical holders
Every license row we've seen with the callsign KO6KO, oldest first.
- BURNS, HARRY L CA2000-05-05 → cancelled 2012-08-01
- PFEIFFER, MICHAEL D CA2013-11-30 → cancelled 2016-02-19
- Kim, Man Seok CA2025-08-08 active