XO Communications Leverages CoreSite to Launch Its New Cloud Compute Service

 XO Communications Leverages CoreSite to Launch Its New Cloud Compute Service

Bi-coastal deployment provides proximity, performance and scalability to meet
customer demand and service requirements

PR Newswire

DENVER, June 11, 2013

DENVER, June 11, 2013 /PRNewswire/ --CoreSite Realty Corporation (NYSE: COR),
a premier provider of network-dense, cloud-enabled data center solutions and
the CoreSite Mesh, today announced that XO Communications is launching its new
XO Compute cloud service from CoreSite's facilities in Northern Virginia and
Los Angeles. XO Communications, one of the largest telecommunications
companies in the U.S., will offer customers across North America a new cloud
service that includes storage, backup and infrastructure as a service (IaaS).

XO Communication's East and West Coast cloud deployments will leverage
CoreSite's data center scalability and customer accessibility to expand and
enhance its well-established best-of-breed network and service offerings,
already present in both CoreSite facilities. The deployments will enable XO
Communications to provide its XO Compute product portfolio to customers
easily, securely and with minimal latency. CoreSite customers will also gain
access to other new offerings as well, including the XO Cloud Vault , XO Cloud
Drive, and XO Enterprise Cloud services to address storage, backup, and IaaS
needs, all of which were announced this week.

XO is deploying at CoreSite's One Wilshire campus in Los Angeles which
provides proximity to over 180 networks and access to a large ecosystem of
digital content providers and enterprises. XO Communications will also grow
its presence at CoreSite's Reston data center campus, which is strategically
located along rich fiber routes and connectivity across Northern Virginia and
Washington, DC, providing immediate access to communities of financial service
providers, government-related agencies and other enterprises.

"Expanding with CoreSite for our new XO Compute portfolio made perfect sense,"
said Don MacNeil, CMO, XO Communications. "Not only do its facilities meet our
growing requirements and support the needs of our customers, but its East and
West Coast data centers will enable us to seamlessly integrate our new cloud
offerings with our existing network presence. The expansion gives mid-size and
enterprise customers nationwide, especially in financial services, healthcare
and business services, easy access to our cloud services with minimal latency
and maximum performance."

"We're delighted to support XO Communications' new Compute cloud services
portfolio as XO Communications grows its business with us," said Jarrett
Appleby, COO, CoreSite. "This expansion gives our broad community of
enterprise and media customers a new cloud solution available across the
CoreSite Mesh, and further strengthens CoreSite's longstanding relationship
with XO Communications."

About XO Communications
XO Communications is a leading nationwide provider of advancedIP
communications, managed network and cloud computing servicesfor business,
large enterprise and wholesale customers. These customers include more than
half of the Fortune 500, in addition to leading cable, mobile wireless and
domestic and international telecommunications companies. XO offers a superior
customer experience through its innovative solutions, its employees' focus on
customers and the proven performance of its advanced network. To learn more
about XO Communications, visitwww.xo.com or blog.xo.com.

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 nine 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.

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:
significant competition in the datacenter industry and an inability to license
vacant space, renew existing licenses or renew licenses as they expire;
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.

SOURCE CoreSite Realty Corporation

Website: http://www.CoreSite.com
Website: http://www.xo.com
Website: http://blog.xo.com
Contact: Jeannie Zaemes, CoreSite Marketing Senior Director, +1-720-446-2006,
+1-866-777-CORE, Jeannie.Zaemes@CoreSite.com
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