Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KH6HAM callsign genealogy
Currently held by VORBAU, JOHN H
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 KH6HAM's current licensee, walking backwards.
- Yonashiro, Samuel CHIgranted 2023-02-16cancelled 2025-04-01
Successor callsigns
Callsigns held now by people who previously held KH6HAM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KH6HAM, oldest first.
- VORBAU, JOHN H HI2011-07-19 → cancelled 2023-08-25
- Yonashiro, Samuel C HI2025-04-01 active