— Investments in Technology, Talent and Training Drive Results —

— Exceeds Uptime Performance Goal for 2018, Improving Customer
Experience and Reducing Costs —

— Achieves 7% improvement in Power Utilization Effectiveness —

DENVER–(BUSINESS WIRE)–lt;a href=”https://twitter.com/hashtag/operationalexcellence?src=hash” target=”_blank”gt;#operationalexcellencelt;/agt;–CoreSite Realty Corporation (NYSE:COR), a premier provider of secure,
reliable, high-performance data
center and interconnection
solutions across the U.S., today announced its 2018 operational
accomplishments, driven by investments in new technology, talent and
increased training.

CoreSite’s operations team participates in a rigorous development
program to deliver a strong customer experience that extends beyond
standard compliance
efforts, consisting of internal training and recurring exams to
achieve an internally designed qualification standard for all
operational employees.

• CoreSite facilities are also DSS and SSAE 16 SOC 1 Type 2 validated,
  providing a third-party review of the reliability of CoreSite’s
  infrastructure and systems

CoreSite targets a goal of “six 9s” or 99.9999% reliability or “uptime”,
across its platform of data center facilities, which raises the bar on
an industry standard of “five 9s”. Five 9s correlates to a downtime of
five minutes annually, but CoreSite knows that customers value every
second of uptime.

• For 2018 CoreSite exceeded its uptime goal, and the industry standard,
  by delivering a portfolio uptime of “seven 9s” or 99.99999% reliability

CoreSite recognizes the significance of downtime to Enterprises,
including monetary and relationship impacts.

• “We understand the importance of data center performance to our
  customers and their need to meet their own customers’ requirements,”
  said Anthony Hatzenbuehler, CoreSite’s Vice President of Data Center
  Operations. “We’re proud to serve the needs of our customers,
  including Dstillery who values our data center ecosystem and
  reliability.”

“Based on our plans and projections for the future, it was imperative
for us to find space in a carrier-neutral environment with access to big
network providers. More importantly, we needed to be able to meet the
highest SLA standards for availability and performance, since even a
second of downtime would result in lost revenues.” Amit Gupta, VP of
Infrastructure, Dstillery

CoreSite also delivered an approximate 7% improvement in 2018 in its
Power Utilization Effectiveness on a same-store basis compared to 2017,
enabled by strategic infrastructure investments and an ongoing program
of operational
excellence.

“We’re pleased to be a leading provider of data center reliability and
efficiencies,” said Dominic Tobin, CoreSite’s SVP of Data Center
Operations and Network Engineering. “Our training, data center
performance and other efficiency accomplishments, underscore our
commitment to deliver our customers the highest level of service.”

Additional Resources

Hurricane
Irma: A Case Study in Readiness (Blog Article)
Dstillery
(Customer case study)

About CoreSite

CoreSite Realty Corporation (NYSE:COR) delivers secure, reliable,
high-performance data center and interconnection solutions to a growing
customer ecosystem across eight key North American markets. More than
1,350 of the world’s leading enterprises, network operators, cloud
providers, and supporting service providers choose CoreSite to connect,
protect and optimize their performance-sensitive data, applications and
computing workloads. Our scalable, flexible solutions and 450+ dedicated
employees consistently deliver unmatched data center options — all of
which leads to a best-in-class customer experience and lasting
relationships. For more information, visit 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: any adverse developments in local economic
conditions or the demand for data center space in these markets;
operational difficulties, including difficulties relating to information
systems, internal processes and information security; significant
industry competition; financial market fluctuations; 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.

Contacts

CoreSite
Carole Jorgensen
Vice President of Investor
Relations and Corporate Communications
[email protected]