Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1OFO callsign genealogy
Currently held by Fukushima, Kazunori
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 W1OFO's current licensee, walking backwards.
- Fukushima, KazunoriCAgranted 2026-02-25cancelled 2026-03-17
Successor callsigns
Callsigns held now by people who previously held W1OFO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1OFO, oldest first.
- ACTON, WILLIAM D RI2004-06-30 → cancelled 2016-09-01
- Fukushima, Kazunori CA2026-03-17 active