Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC6SGN callsign genealogy
Currently held by CREMO, RALPH F
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 KC6SGN's current licensee, walking backwards.
- Cremo, Brian JCOgranted 2024-05-14cancelled 2024-06-01
Successor callsigns
Callsigns held now by people who previously held KC6SGN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC6SGN, oldest first.
- CREMO, RALPH F CA2001-12-11 → cancelled 2014-03-11
- Cremo, Brian J CO2024-06-01 active