Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KH0AM callsign genealogy
Currently held by KUMAGAI, TAKAO
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 KH0AM's current licensee, walking backwards.
- Kumagai, TakaoOHgranted 2024-07-16cancelled 2026-03-13
Successor callsigns
Callsigns held now by people who previously held KH0AM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KH0AM, oldest first.
- KUMAGAI, TAKAO OH2011-08-08 → cancelled 2023-10-11
- Kumagai, Takao OH2026-03-13 active