MCI’s hosting clients include marquee names like The Weather Channel and Bloomberg, as well as the U.S. government’s Defense Nuclear Facilities Safety Board, which safeguards America’s nuclear weapons arsenal.

MCI has substantial hosting capacity, as WorldCom built a huge network of more than 100 data centers during the dot-com boom, including more than 20 premium data centers spanning 100,000 square feet. Three of those centers were sold in bankrupcty auctions in 2003, raising $87 million to help repay creditors. The company, which had more than $103 billion in assets when it filed Chapter 11, emerged from bankruptcy last year with about $5 billion in debt and more than $6 billion in cash.

Verizon currently has a minimal hosting operation, with just 10K web-visible hostnames.