Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9GRQ callsign genealogy
Currently held by GIESFELDT, ROBERT T
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 N9GRQ's current licensee, walking backwards.
- Giesfeldt, Robert TWIgranted 2015-11-30cancelled 2015-12-22
Successor callsigns
Callsigns held now by people who previously held N9GRQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9GRQ, oldest first.
- GIESFELDT, ROBERT T WI1996-02-09 → cancelled 2008-02-12
- Giesfeldt, Robert T WI2015-12-22 active