Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4ZB callsign genealogy
Currently held by Pratt, John S
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 KZ4ZB's current licensee, walking backwards.
- Pratt, John SNCgranted 2025-11-21cancelled 2026-01-13
Successor callsigns
Callsigns held now by people who previously held KZ4ZB.
- Pratt, John SNCgranted 2026-04-14