Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4HZN callsign genealogy
Currently held by NOWAKOSKI, DONALD B
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 K4HZN's current licensee, walking backwards.
- Hazen JR, James EALgranted 2021-06-28cancelled 2022-05-27
Successor callsigns
Callsigns held now by people who previously held K4HZN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4HZN, oldest first.
- NOWAKOSKI, DONALD B VA1997-07-23 → cancelled 2009-07-24
- Hazen JR, James E AL2022-05-27 active