Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KNZ callsign genealogy
Currently held by HOLLIDAY, MACKENZIE
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 K4KNZ's current licensee, walking backwards.
- Holliday, MackenzieFLgranted 2020-07-30cancelled 2020-08-18
Successor callsigns
Callsigns held now by people who previously held K4KNZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KNZ, oldest first.
- Fordham, John W FL2003-03-07 → cancelled 2015-06-02
- HOLLIDAY, MACKENZIE FL2020-08-18 active