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Partial Redemption of 8.125% Senior Secured Notes due 2020, 10.125% Senior Unsecured Notes due 2020

Boulder, Colo. – November 14, 2014 – Zayo Group, LLC (“Zayo”), a subsidiary of Zayo Group Holdings, Inc. (NYSE:ZAYO), an international provider of Bandwidth Infrastructure services, announced today that it intends to call for redemption of $75.0 million of its outstanding 8.125% Senior Secured Notes due 2020 (CUSIP No. 989194AG0) (the “Senior Secured Notes”) at a price of 108.125% of the principal amount, plus accrued and unpaid interest to the redemption date.  Zayo also announced today that it intends to call for redemption of $174.4 million of its outstanding 10.125% Senior Unsecured Notes due 2020 (CUSIP Nos. 989194AH8 and 98919UAD9) (the “Senior Notes”) at a price of 110.125% of the principal amount, plus accrued and unpaid interest to the redemption date.

The partial redemption of the Senior Secured Notes and Senior Notes will be funded with a portion of the proceeds of Zayo Group Holdings’ initial public offering, which was completed on October 22, 2014.

Zayo expects that the redemption date will be the 30th day following the delivery of notice of the partial redemption by the trustee for the Senior Secured Notes and Senior Notes, The Bank of New York Mellon Trust Company, N.A. The selection of notes to be redeemed will be made by the trustee.

About Zayo Group

Based in Boulder, Colo., Zayo Group Holdings, Inc. (NYSE: ZAYO) is a publicly traded company that provides comprehensive Bandwidth Infrastructure services in over 300 markets throughout the US and Europe. Zayo delivers a full suite of lit services and dark fiber products to wireline and wireless customers, data centers, Internet content providers, high-bandwidth enterprises, and government agencies across its robust 81,000 route mile network. The company also offers 37 carrier-neutral colocation facilities across the US and France. Please visit www.zayo.com for more information about Zayo and its fiber solutions.

Media Contact

Zayo Group

Crystal Thomas, 720-361-1797

crystal.thomas@zayo.com