Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NZ4M callsign genealogy
Currently held by PARKER, JOHN R
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 NZ4M's current licensee, walking backwards.
- Maida, MasayukiTNgranted 2010-03-12cancelled 2010-04-02
Successor callsigns
Callsigns held now by people who previously held NZ4M.
- PARKER, JOHN RMIgranted 2017-12-19
All historical holders
Every license row we've seen with the callsign NZ4M, oldest first.
- PARKER, JOHN R MI1998-11-02 → cancelled 2008-03-14
- Maida, Masayuki MS2020-01-14 active