Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4EV callsign genealogy
Currently held by Ulrich, Frank N
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 KZ4EV's current licensee, walking backwards.
- Ulrich, Frank NNCgranted 2016-08-08cancelled 2024-03-05
- AA8BZno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KZ4EV.
No current licensee on record previously held this callsign.