Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2SFO callsign genealogy
Currently held by FERRERA, JOHN A
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 K2SFO's current licensee, walking backwards.
- Ferrera, John ANJgranted 2005-05-24cancelled 2005-07-02
Successor callsigns
Callsigns held now by people who previously held K2SFO.
No current licensee on record previously held this callsign.