According to Radio-locator the call letters KRAM are not in use by any licensed radio station.
Furthermore, a half-hearted search has not turned up any part 15 stations named "KRAM".
Therefore, henceforth, the name is Formally Claimed by Carl Blare, for use with shortwave station formally called KDX-SW.
It will be known as...
KRAM, 13.560 MHz, Shortwave, broadcasting from the Flooded Midwaste of the Homeland
Anyone who makes unauthorized use of the letters "KRAM" will be subject to our self-driving direction-locating surveillance truck blocking your driveway and sounding the horn until the battery runs down.