The Extranet is an intergalactic version of the Internet. The Rust Bucket 3 and a Plumber Badge can access it. Plumber Headquarters can access it also.
According to Gwen, the Extranet can access any database on Earth, including secure ones.
According to Rook, information about Ben's adventures and exploits can be found on the Extranet.
- Rook used to think that Alien X was just a myth that circulated around the Extranet.