Back in 2003 I was an employee of the now defunct Worldcom. (yes...THAT Worldcom!) I worked in their legal department as a paralegal assisting where ever I was needed.
One of the only profitable subsidaries of Worldcom was UUNET--a very large part of the backbone of the internet. basically, most of that internet traffic you often hear about goes through this large room in Northern Virginia that looks like mission control. It's pretty insane.