Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4FM callsign genealogy
Currently held by Johnson, William L
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 KZ4FM's current licensee, walking backwards.
- Johnson, William LKYgranted 2024-01-25cancelled 2024-03-22
Successor callsigns
Callsigns held now by people who previously held KZ4FM.
- Johnson, William LKYgranted 2024-09-21