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SuperFox keys, which allow WSJT-X to operate in SuperFox mode, are issued by the Northern California DX Foundation. The current list of SuperFox Keys issued by the NCDXF (last updated on 10 September) can be found at https://ncdxf.org/pages/sfkey.html. Included in the list are the ongoing operations of C21TS, KH8T, VP6WR and ZD9GJ.