Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4ZIL callsign genealogy
Currently held by HAARTJE JR, JOHN R
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 KN4ZIL's current licensee, walking backwards.
- HAARTJE JR, JOHN RGAgranted 2012-08-20cancelled 2019-10-23
Successor callsigns
Callsigns held now by people who previously held KN4ZIL.
No current licensee on record previously held this callsign.