Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6SJC callsign genealogy
Currently held by County Of San Joaquin Oes Acs
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 K6SJC's current licensee, walking backwards.
- KJ5LQCcancelledStrake Jesuit Radio ClubTXgranted 2025-06-11cancelled 2025-07-01
Successor callsigns
Callsigns held now by people who previously held K6SJC.
- Silva, J.C. LCAgranted 2018-06-26
All historical holders
Every license row we've seen with the callsign K6SJC, oldest first.
- Silva, Julius Ceasar L CA2005-03-22 → cancelled 2008-03-25
- County Of San Joaquin Oes Acs CA2012-07-21 → cancelled 2024-07-23
- Strake Jesuit Radio Club TX2025-07-01 active