Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4ELM callsign genealogy
Currently held by Mrozkowski, Daniel 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 KZ4ELM's current licensee, walking backwards.
- Mrozkowski, Daniel CNCgranted 2024-01-31cancelled 2024-02-21
Successor callsigns
Callsigns held now by people who previously held KZ4ELM.
- Mrozkowski, Daniel CNCgranted 2024-05-07