NTT Communications Expands Global IP Network Footprint with CoreSite across North America

CoreSite Realty Corporation (NYSE: COR), a premier provider of network-dense, cloud-enabled data center solutions and the CoreSite Mesh, today announced an expanded relationship with NTT Communications Corporation. A wholly-owned subsidiary of NTT (NYSE: NTT), the world’s largest provider of telecommunications services according to the 2013 Fortune Global 500 List, NTT Communications is entering CoreSite’s Silicon Valley and Northern Virginia campuses, and growing its presence at CoreSite’s Chicago and Los Angeles (One Wilshire) facilities.

Today’s expansion will enable NTT Communications to scale its offerings to large content companies, internet service providers (ISPs) and enterprises and increase its access to CoreSite’s growing community of customers. In turn, CoreSite customers will benefit from a direct link to NTT Communications’ Global IP Network as well as more connectivity options across the CoreSite Mesh.

“The facilities we choose to connect into directly impact the growth of our customer base,” said Michael Wheeler, Executive Vice President, NTT America. “NTT Communications has had a successful relationship with CoreSite in Los Angeles and Chicago. We are excited to expand our presence in those locations, and extend our footprint with CoreSite into Silicon Valley and Northern Virginia in order to reach a broad community of internet-centric businesses.”

CoreSite’s data centers in Silicon Valley, Los Angeles, Chicago and Northern Virginia will provide NTT Communications with access to the CoreSite Mesh, including more than 750 national and international carriers, cloud computing providers, networks, content and service providers, financial trading firms, CDNs and systems integrators.

“NTT Communications operates one of the world’s largest Tier-1 global networks,” said Jarrett Appleby, COO, CoreSite. “Today’s announcement brings tremendous value to our ecosystem of customers. It delivers direct access to NTT Communications’ network through four of our key data center campuses and increases the global connectivity options available to customers across the CoreSite Mesh.”

About NTT Communications

NTT Communications provides consultancy, architecture, security and cloud services to optimize the information and communications technology (ICT) environments of enterprises. These offerings are backed by the company’s worldwide infrastructure, including leading global tier-1 IP network, Arcstar Universal One™ VPN network reaching over 160 countries/regions, and over 140 secure data centers. NTT Communications’ solutions leverage the global resources of NTT Group companies including Dimension Data, NTT DOCOMO and NTT DATA.　

For U.S. product and service information, please visit www.us.ntt.net.

About CoreSite

CoreSite Realty Corporation (NYSE: COR) is the data center provider chosen by more than 750 of the world's leading carriers and mobile operators, content and cloud providers, media and entertainment companies, and global enterprises to run their performance-sensitive applications and to connect and do business. CoreSite propels customer growth and long-term competitive advantage through the CoreSite Mesh by connecting the Internet, private networking, mobility, and cloud communities within and across its 14 high-performance data center campuses in eight markets in North America. With direct access to 275+ carriers and ISPs, over 180 leading cloud and IT service providers, intersite connectivity, and the nation's first Open Cloud Exchange that provides access to thousands of lit buildings and multiple key cloud on-ramps, CoreSite provides easy, efficient and valuable gateways to global business opportunities. For more information, visit www.CoreSite.com.

CoreSite Media Contact

Jeannie Zaemes | CoreSite Marketing Senior Director

+1 720.446.2006 | +1 866.777.CORE

Jeannie.Zaemes@CoreSite.com

Forward Looking Statements

This press release may contain forward-looking statements within the meaning of the federal securities laws. Forward-looking statements relate to expectations, beliefs, projections, future plans and strategies, anticipated events or trends and similar expressions concerning matters that are not historical facts. In some cases, you can identify forward-looking statements by the use of forward-looking terminology such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” “pro forma,” “estimates” or “anticipates” or the negative of these words and phrases or similar words or phrases that are predictions of or indicate future events or trends and that do not relate solely to historical matters. Forward-looking statements involve known and unknown risks, uncertainties, assumptions and contingencies, many of which are beyond CoreSite’s control, that may cause actual results to differ significantly from those expressed in any forward-looking statement. These risks include, without limitation: the geographic concentration of CoreSite’s data centers in certain markets and any adverse developments in local economic conditions or the demand for data center space in these markets; fluctuations in interest rates and increased operating costs; difficulties in identifying properties to acquire and completing acquisitions; significant industry competition; CoreSite’s failure to obtain necessary outside financing; CoreSite’s failure to qualify or maintain its status as a REIT; financial market fluctuations; changes in real estate and zoning laws and increases in real property tax rates; and other factors affecting the real estate industry generally. All forward-looking statements reflect CoreSite’s good faith beliefs, assumptions and expectations, but they are not guarantees of future performance. Furthermore, CoreSite disclaims any obligation to publicly update or revise any forward-looking statement to reflect changes in underlying assumptions or factors, of new information, data or methods, future events or other changes. For a further discussion of these and other factors that could cause CoreSite’s future results to differ materially from any forward-looking statements, see the section entitled “Risk Factors” in CoreSite’s most recent annual report on Form 10-K, and other risks described in documents subsequently filed by CoreSite from time to time with the Securities and Exchange Commission.