Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0GAM callsign genealogy
Currently held by HELSETH, MARK R
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 KC0GAM's current licensee, walking backwards.
- Helseth, Mark RMNgranted 2025-08-20cancelled 2025-09-09
Successor callsigns
Callsigns held now by people who previously held KC0GAM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC0GAM, oldest first.
- HELSETH, MARK R MN1999-06-21 → cancelled 2011-06-22
- Helseth, Mark R MN2025-09-09 active