Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1GBC callsign genealogy
Currently held by SICA, JOHN 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 N1GBC's current licensee, walking backwards.
- DUMAS, ROY SNHgranted 2000-09-27cancelled 2010-11-23
- KA1WKCno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N1GBC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1GBC, oldest first.
- SICA, JOHN A MA1998-11-02 → cancelled 2010-11-03
- DUMAS, ROY S NH2021-01-12 active