Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF0BAY callsign genealogy
Currently held by Bay, Aaron
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 KF0BAY's current licensee, walking backwards.
- Bay, AaronCOgranted 2023-12-06cancelled 2024-01-26
Successor callsigns
Callsigns held now by people who previously held KF0BAY.
- Grisak, DenisCOgranted 2021-01-19cancelled 2021-02-17
All historical holders
Every license row we've seen with the callsign KF0BAY, oldest first.
- Grisak, Denis CO2020-07-30 → cancelled 2021-01-19
- Bay, Aaron CO2024-01-26 active