407 and 507 HD. Right now it appears to be mostly a time shifted TSN, but Last year it did carry 25 of the Raptors games without it being on any other Rogers channels and Rogers didn't carry it, while other providers did TSN2.
It is on channel 98 in my area, Scarborough, as well.
I have noticed it has had it's own programing on a few occasions. I remember one night a week ago or so, TSN was showing one game while TSN2 carried a different NHL hockey game live.