Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6SMM callsign genealogy
Currently held by GRATER, VINCENT 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 W6SMM's current licensee, walking backwards.
- Michitaka, Sachihiko MCAgranted 2023-12-14cancelled 2024-01-03
Successor callsigns
Callsigns held now by people who previously held W6SMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6SMM, oldest first.
- GRATER, VINCENT M CA1995-11-28 → cancelled 2001-07-05
- Michitaka, Sachihiko M CA2024-01-03 active