Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6KDO callsign genealogy
Currently held by Du Bry, John A
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 K6KDO's current licensee, walking backwards.
- Pierson, Mike WCAgranted 2019-11-19cancelled 2020-02-21
Successor callsigns
Callsigns held now by people who previously held K6KDO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6KDO, oldest first.
- Du Bry, John A NV2007-10-26 → cancelled 2020-01-24
- Pierson, Mike W CA2020-02-21 active