Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6SJC callsign genealogy
Currently held by ZOLFO, FRANK B
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 W6SJC's current licensee, walking backwards.
- KG6TSUcancelledSan Jose City CommunicationsCAgranted 2004-02-04cancelled 2004-03-06
Successor callsigns
Callsigns held now by people who previously held W6SJC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6SJC, oldest first.
- ZOLFO, FRANK B CA1987-12-01 → cancelled 1999-12-02
- San Jose City Communications CA2026-02-04 active