Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N7GZZ callsign genealogy
Currently held by HALLMARK, KEITH 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 N7GZZ's current licensee, walking backwards.
- DeGRAZZIO, DOUGLAS ACAgranted 2013-04-19cancelled 2013-05-14
Successor callsigns
Callsigns held now by people who previously held N7GZZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7GZZ, oldest first.
- HALLMARK, KEITH L OR1995-04-26 → cancelled 2007-04-27
- DEGRAZZIO, DOUGLAS A CA2023-02-22 active