ZAYO EXPANDS LOS ANGELES DATA CENTER PRESENCE

Large anchor tenant, strong customer demand drive expansion

BOULDER, Colo. – April 13, 2017 –  Zayo Group Holdings, Inc. (NYSE: ZAYO) will significantly expand its Los Angeles data center presence with a new location at One Wilshire Building, 624 S Grand Ave. The facility will add 24,215 total square feet and two megawatts (MW) of critical power, and is the company’s fifth data center in California.The expansion is driven by strong customer demand in Los Angeles, including a new agreement with a major webscale company as an anchor tenant in the space.

One Wilshire in Los Angeles is the preeminent point of connectivity between North America and Asia’s Pacific Coast, making it one of the most significant carrier hotels in the world. Customers are able to connect to over 240 carriers within the building, along with nearly 110 cloud and IT service providers.

The data center complements Zayo’s Tier III facilities in nearby Irvine, California, which are connected to One Wilshire via high-performance dark fiber. Customers are able to connect to Zayo’s expansive fiber network, which now includes a unique subsea fiber route up the coast of California, recently acquired from Electric Lightwave.

“zColo’s One Wilshire data center will provide carrier-neutral connectivity to all the major telecommunications and cloud providers,”said TJ Karklins, senior vice president of Zayo’s zColo business segment. “This facility will provide high-quality infrastructure to our clients in the globally significant Los Angeles data center market. ”

For more information on Zayo’s data centers, please visit zayo.com/services/data-center-colocation/.

About Zayo Group

Zayo Group Holdings, Inc. (NYSE: ZAYO) provides communications infrastructure services, including fiber and bandwidth connectivity, colocation and cloud infrastructure to the world’s leading businesses. Customers include wireless and wireline carriers, media and content companies and finance, healthcare and other large enterprises. Zayo’s 126,000-network in North America and Europe includes extensive metro connectivity to thousands of buildings and data centers. In addition to high capacity dark fiber, wavelength, Ethernet and other connectivity solutions, Zayo offers colocation and cloud infrastructure in its carrier-neutral data centers. Zayo provides clients with flexible, customized solutions and self-service through Tranzact, an innovative online platform for managing and purchasing bandwidth and services. For more information, visit zayo.com.

Forward Looking Statements

This press release contains a number of forward-looking statements. Words, and variations of words such as “believe,” “expect,” “plan,” “continue,” “will,” “should,” and similar expressions are intended to identify our forward-looking statements. No assurance can be given that future results expressed or implied by the forward-looking statements will be achieved and actual results may differ materially from those contemplated by the forward-looking statements. These forward-looking statements involve risks and uncertainties, many of which are beyond our control. For additional information on these and other factors that could affect our forward-looking statements, see our risk factors, as they may be amended from time to time, set forth in our filings with the SEC, including our 10-K dated August 25, 2016. We disclaim and do not undertake any obligation to update or revise any forward-looking statement in this press release, except as required by applicable law or regulation.