Those are the seed nodes for finding peers in the network when you're starting Bitcoin for the first time, and there aren't other known peers. Sure, you could a

Those are the seed nodes for finding peers in the network when you're starting Bitcoin for the first time, and there aren't other known peers. Sure, you could ask around for additional peers through other channels. Btw, I couldn't find these on the newest version, so I'm not sure how they do it now.