A key player in Amazon’s expansion is Northern Virginia is Corporate Office Properties Trust (COPT), a real estate investment trust that is a leading landlord for the U.S. government and defense contractors. COPT is known for leasing specialized space for national security tenants, but has quietly become one of the largest providers of cloud computing real estate. These initial data centers form the nucleus of Amazon US East, its oldest and largest of its cloud regions. Amazon doesn’t disclose the full scope of its infrastructure, but third-party estimates peg its U.S. data center network at about 700 megawatts of IT capacity, with as much as 500 MW of that total focused in US East. The company operates nine data centers in Sterling and six in Ashburn (with three more under construction) as well six in Manassas (with two more in the works). The company also has two data facilities in Chantilly, and is planning to expand its infrastructure into Haymarket in Prince William County.