Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4AZX callsign genealogy
Currently held by HERZBERGER, CARL J
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 N4AZX's current licensee, walking backwards.
- Gatineau, Michael DFLgranted 2018-09-18cancelled 2020-09-11
Successor callsigns
Callsigns held now by people who previously held N4AZX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4AZX, oldest first.
- HERZBERGER, CARL J FL1988-07-26 → cancelled 2000-07-27
- Gatineau, Michael D FL2020-09-11 active