questions

What is "unknown" location? a part in this site where Ender didn't set a specific name?

73 Phoenix Phoenix unknown

Its a 404 i think ender has said.

Yeah, it's places where a location hasn't been set. All pages should have it, but there are a few missing ones like on training/fighting if you click the wrong link, it never gets to the part that sets your location, so it appears as "unknown".

404 is "lost in space".

ohh ok, thanks for the info!:)