Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4ZM callsign genealogy
Currently held by Heinrich, Nancy L
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 N4ZM's current licensee, walking backwards.
- Heinrich, Nancy LFLgranted 2015-11-24cancelled 2019-06-28
Successor callsigns
Callsigns held now by people who previously held N4ZM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ZM, oldest first.
- MORGAN JR, ZEBULON V GA2007-04-04 → cancelled 2019-06-11
- Heinrich, Nancy L FL2019-06-28 active