Never heard of them. Here's a place to start looking.. http://ai.fmcsa.dot.gov/SMS/Data/carrier.aspx?enc=u67ExhK13eYgyxJwXN7M5umL05nNNNdgkBLeFXHfLDQ=
If I remembercorrectly, Core is one of 3 transportation companies owned by the same group. STL is another and can't remember the 3rd.