Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NR4Z callsign genealogy
Currently held by STEPHENS, HERBERT H
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 NR4Z's current licensee, walking backwards.
- RUDOLPH, MARK AVAgranted 2003-07-08cancelled 2006-12-12
Successor callsigns
Callsigns held now by people who previously held NR4Z.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NR4Z, oldest first.
- STEPHENS, HERBERT H AL1996-10-08 → cancelled 1997-05-08
- RUDOLPH, MARK A VA2018-09-19 active