Is the server up? What's the I.P.? Is the name different? Help.

I'm quite confused. I have not found the Classic server on the list on Minecraft.Net, and tried all of the I.P.'s on the forum, yet none of them work. But I've also seen people talking about the server like it's up. Is it a new name? Is the full version Minecraft server up? If so, what's the I.P.? Please respond soon, I thought this server was down, I'd be so glad to see it back up.