Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC3GDT callsign genealogy
Currently held by MONTORO, ROBERTO M
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 KC3GDT's current licensee, walking backwards.
- Montoro, Anna MMDgranted 2022-02-14cancelled 2022-12-20
Successor callsigns
Callsigns held now by people who previously held KC3GDT.
- MONTORO, ROBERTO MMDgranted 2020-11-24
All historical holders
Every license row we've seen with the callsign KC3GDT, oldest first.
- MONTORO, ROBERTO M MD2015-12-11 → cancelled 2020-11-24
- Montoro, Anna M MD2022-12-20 active