Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4AU callsign genealogy
Currently held by STEFFENSMEIER, TODD W
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 KZ4AU's current licensee, walking backwards.
- STEFFENSMEIER, TODD WTNgranted 2022-06-15cancelled 2023-09-12
Successor callsigns
Callsigns held now by people who previously held KZ4AU.
No current licensee on record previously held this callsign.