I wanted to help out. I read that the rangetest list reports ip's under suspicion, and you requested someone report if a block occurs to one of it's ip's.

When trying to visit www.kcroyals.com, I received a block for CERFnet from ip 63.240.10.48:80. I receive the same block when trying to visit www.detroittigers.com. Then I tried www.mlb.com and got the same block to ip 63.240.10.41:80. All these sites are related (for those that don't know MLB baseball).

I hope this information helps with your research of good/bad ip's. Have a nice day.