Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6SFI callsign genealogy
Currently held by FRANZEL, ROBERT H
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 K6SFI's current licensee, walking backwards.
- BECKSTRAND MR, JAMES GCAgranted 2024-04-17cancelled 2025-09-20
Successor callsigns
Callsigns held now by people who previously held K6SFI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6SFI, oldest first.
- FRANZEL, ROBERT H CA1987-08-18 → cancelled 1999-08-20
- BECKSTRAND MR, JAMES G CA2025-09-20 active