Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD6KOI callsign genealogy
Currently held by PILTZ MR., MICHAEL D
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 KD6KOI's current licensee, walking backwards.
- Piltz, Michael DCAgranted 2017-02-02cancelled 2017-02-25
Successor callsigns
Callsigns held now by people who previously held KD6KOI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD6KOI, oldest first.
- PILTZ MR., MICHAEL D CA2004-02-27 → cancelled 2016-05-25
- Piltz, Michael D CA2017-02-25 active