Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N7SGT callsign genealogy
Currently held by KETCHUM, WILLIAM 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 N7SGT's current licensee, walking backwards.
- Lubke, Richard JNMgranted 2011-01-24cancelled 2015-01-21
Successor callsigns
Callsigns held now by people who previously held N7SGT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7SGT, oldest first.
- KETCHUM, WILLIAM M NV2001-03-28 → cancelled 2013-06-26
- Lubke, Richard J NM2024-12-03 active