Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6KNH callsign genealogy
Currently held by SCHOENFELD JR, CLYDE J
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 W6KNH's current licensee, walking backwards.
- Sado, MamoruCAgranted 2000-10-11cancelled 2001-09-01
Successor callsigns
Callsigns held now by people who previously held W6KNH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6KNH, oldest first.
- SCHOENFELD JR, CLYDE J CA1988-03-22 → cancelled 2000-03-23
- Sado, Mamoru CA2021-12-09 active