Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4EF callsign genealogy
Currently held by Cohn, Robert 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 KZ4EF's current licensee, walking backwards.
- Cohn, Robert WTNgranted 2018-07-31cancelled 2024-02-20
Successor callsigns
Callsigns held now by people who previously held KZ4EF.
No current licensee on record previously held this callsign.