Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WF6U callsign genealogy
Currently held by BUTTON, HOLLIS 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 WF6U's current licensee, walking backwards.
- OIKAWA, MASATOORgranted 2009-03-12cancelled 2009-08-14
Successor callsigns
Callsigns held now by people who previously held WF6U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WF6U, oldest first.
- BUTTON, HOLLIS E CA1995-03-06 → cancelled 1996-05-25
- OIKAWA, MASATO CA2019-06-05 active