Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4CPM callsign genealogy
Currently held by HEINECKE, JUSTIN M
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 KD4CPM's current licensee, walking backwards.
- Heinecke, Justin MNCgranted 2017-08-21cancelled 2018-02-13
Successor callsigns
Callsigns held now by people who previously held KD4CPM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4CPM, oldest first.
- HEINECKE, JUSTIN M NC2004-01-06 → cancelled 2016-01-07
- Heinecke, Justin M NC2018-02-13 active