Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4SLF callsign genealogy
Currently held by Kozlowski, Aaron S
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 KZ4SLF's current licensee, walking backwards.
- Kozlowski, Aaron SINgranted 2018-10-29cancelled 2018-11-17
Successor callsigns
Callsigns held now by people who previously held KZ4SLF.
No current licensee on record previously held this callsign.