Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N6JJK callsign genealogy
Currently held by HEINECKE, FREDERICK 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 N6JJK's current licensee, walking backwards.
- King, John JCAgranted 2025-02-11cancelled 2025-03-04
Successor callsigns
Callsigns held now by people who previously held N6JJK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N6JJK, oldest first.
- HEINECKE, FREDERICK A CA2000-03-07 → cancelled 2012-03-08
- King, John J CA2025-03-04 active