Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6SFR callsign genealogy
Currently held by Last Frontier Council Amateur Radio Club
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 K6SFR's current licensee, walking backwards.
- KJ5KNVcancelledLast Frontier Council Amateur Radio ClubOKgranted 2025-03-15cancelled 2025-04-19
Successor callsigns
Callsigns held now by people who previously held K6SFR.
- SPINOSA, JOECAgranted 1998-06-02cancelled 2010-06-03
All historical holders
Every license row we've seen with the callsign K6SFR, oldest first.
- Last Frontier Council Amateur Radio Club OK2025-04-19 active
- SPINOSA, JOE— → cancelled 1998-06-02