Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4CCK callsign genealogy
Currently held by LEEUWENBURG, JOHN C
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 N4CCK's current licensee, walking backwards.
- King III, Carl CFLgranted 2024-06-13cancelled 2024-08-09
Successor callsigns
Callsigns held now by people who previously held N4CCK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4CCK, oldest first.
- LEEUWENBURG, JOHN C NC1994-07-08 → cancelled 2006-07-11
- King III, Carl C FL2024-08-09 active