Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AF0SF callsign genealogy
Currently held by Gambetta, D. Michael
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 AF0SF's current licensee, walking backwards.
- Gambetta, D. MichaelCOgranted 2023-03-29cancelled 2024-06-18
Successor callsigns
Callsigns held now by people who previously held AF0SF.
No current licensee on record previously held this callsign.