Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC0SF callsign genealogy
Currently held by FORBES, SAMUEL
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 AC0SF's current licensee, walking backwards.
- FORBES, SAMUELKSgranted 2021-04-07cancelled 2021-07-16
Successor callsigns
Callsigns held now by people who previously held AC0SF.
- Wills, Matthew RKSgranted 2020-05-05
All historical holders
Every license row we've seen with the callsign AC0SF, oldest first.
- WILLS, MATTHEW R KS2010-05-20 → cancelled 2010-06-15
- FORBES, SAMUEL KS2021-07-16 active