Some people have enough time on their hands that they can compile a list of all the domains that Google owns.
Who knows. Neil Patel, I presume, over at Pronet Advertising. He’s compiled a list of 520 domains that Google owns either for services they use, companies they’ve bought, or pre-emptive protection (‘googlesucks.com’ for example).
If you enjoy reading through lists of domain names, this is the site for you.