Zayo Group Holdings, Inc. announced its latest series of infrastructure investments to extend global capacity to support rapidly increasing bandwidth demand?including deployment of 400G across the globe, long-haul capacity growth, and enhancements to its global IP infrastructure. For digital businesses, 400G is essential to ensure the speed and scalability to support increasingly complex and data-intensive applications. Zayo recently completed upgrades of its European network to be fully 400G-enabled, with plans for its Tier-1 backbone in North America to be fully 400G-enabled by the end of 2024. In third quarter, Zayo added nine new 400G-enabled routes to its North American network to provide high-bandwidth options between key cities, including: Atlanta to DC; Denver to Dallas (Direct); Montreal to Quebec City; Clinton to Ponchatoula; Indianapolis to Columbus; Ashburn to Baltimore; Bend to Umatilla; Laurel to Denver. Additional 400G routes in progress include: Houston to New Orleans; St. Louis to Chicago; Buffalo to Albany; Winnipeg to Toronto;· Toronto to Montreal; Buffalo to Toronto; Columbus to Ashburn; Cleveland to Buffalo; Houston to Ponchatoula; · Umatilla to Quincy. What this means: The enablement of Zayo?s global network with 400G will allow customers to continue scaling their bandwidth with Zayo on existing routes, opening up high-capacity access on new routes, improving network stability and providing an overall better customer experience through quicker delivery and optimal routing. The enhanced capacity from these routes will support customers that have exponential growth needs driven by emerging technologies such as 5G, cloud adoption, IoT, AI, edge computing, and automation. IP demand continues to be a driver for capacity increases. Zayo continues to bolster its IP infrastructure with new PoPs in key markets and data centers across the globe.Zayo added eight new IP PoPs to its North American network in third quarter, including: 45 Parliament St, Toronto, ON; 250 Williams St NW, Atlanta, GA; 6477 W Wells Park Rd, Salt Lake City, UT; 2335 S Ellis St, Chandler, AZ; 375 Pearl St, New York, NY; 626 Wilshire Blvd, Los Angeles, CA; 431 Horner Ave, Etobicoke, ON; 1100 White St SW, Atlanta, GA. Zayo's IP backbone, which runs on Zayo's wholly owned fiber infrastructure, makes up nearly 10% of the world's Internet capacity. Zayo currently manages 96Tb of core capacity and 34TB of peering capacity, and adds 1-2Tb of peering capacity every quarter. Upgrading Long-Haul Capacity: As one of the other providers actively investing in its long-haul infrastructure, Zayo is continuing to overbuild its routes in high-demand areas to enable enhanced fiber capacity. In Third Quarter 2023, Zayo completed the overbuild of its Omaha to Denver route, providing increased capacity on this highly sought-after route.

Zayo also has three new long-haul route builds and two additional route overbuilds in progress with scheduled
completion by the end of 2023. What this means: The enhancement to Zayo?s long-haul dark fiber routes provide customers with diverse routing options and the ability to customize and enhance their network to meet the unique needs of their businesses while maximizing resiliency and ability to scale. Zayo will continue to invest in future-proofing its network and services to connect what?s next for its customers.