Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9GZP callsign genealogy
Currently held by HEUERMANN, MARC A
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 N9GZP's current licensee, walking backwards.
- Heuemann, Marc AILgranted 2014-09-26cancelled 2014-10-24
Successor callsigns
Callsigns held now by people who previously held N9GZP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9GZP, oldest first.
- HEUERMANN, MARC A IL1997-07-07 → cancelled 2009-07-08
- Heuermann, Marc A IL2014-10-24 active