Com.Google
com.google
com.google
For a while, there was a URL shortener running on http://to. Ultimately it was scrapped because browser support was unstable, to say the least. In chrome, you had to add the dot or it would do a Google search, for example.
Edit: Actually, I just checked, and to. still resolves, to 216.74.32.107 to be exact. But if you access it, there's only a default Apache2 "It works" page.