Radio Underground 6284 Khz Radio Underground is on 6284 Khz at 2042 Utc with SINPO 24322. Better at SDR Twente SINPO 24333 at 2137 Utc: Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print Related