Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6ZSV callsign genealogy
Currently held by KETCHUM, HAROLD E
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 W6ZSV's current licensee, walking backwards.
- Van Der Walt, Stefan JCAgranted 2021-04-12cancelled 2021-05-29
Successor callsigns
Callsigns held now by people who previously held W6ZSV.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6ZSV, oldest first.
- KETCHUM, HAROLD E CA1987-08-25 → cancelled 1999-09-01
- Van Der Walt, Stefan J CA2021-05-29 active