Zayo Group

Crown Castle designs, builds & operates small cell networks nationwide, enhancing mobile densification for cellular carriers.

Intelligent Fiber Network, LLC, established in 2002 and headquartered in Indianapolis, Indiana, specializes in fiber optic and telecommunications services across the United States. The company provides a range of offerings including Ethernet transport, backhaul, SONET/TDM, high-speed wavelength services, dedicated Internet access, co-location, and carrier meet point services. Additionally, it caters to the specific needs of its clients with custom fiber builds, voice, video, and data services, as well as capacity leasing and Internet service provider backbone transport. Intelligent Fiber Network primarily serves medium to large enterprise clients, national carriers, and international carriers, leveraging the stability and expertise of its member-owned independent telephone companies, which typically have over a century of operational history. The company is committed to maintaining high standards of service, aiming for 99.999% network uptime to ensure reliability for its customers.

Neutral Path Communications is a fiber communication services provider based in Mankato, Minnesota, focused on addressing the growing demand for efficient fiber connectivity in the Midwest. The company specializes in operating neutral fiber network lines, offering a range of services including dark fiber, optical and dim waves, Ethernet, and cross-connect solutions. Neutral Path is designed to simplify the process of accessing fiber infrastructure, enabling broadband providers, content delivery networks, data-center operators, and other network operators to connect seamlessly to key carrier aggregation points. By optimizing these connections, Neutral Path facilitates cost-effective peering and access to low-cost upstream Internet providers. Additionally, the company establishes wholesale partnerships with existing fiber owner/operators, enhancing access to last-mile destinations and generating new revenue opportunities for customer partners through the utilization of underused fiber capacity.

Optic Zoo Networks Ltd., founded in 2011 and based in Burnaby, Canada, specializes in owning and operating a high-capacity fiber network and infrastructure. The company has developed an extensive carrier-grade dark fiber network throughout Metro Vancouver, offering cost-effective network solutions tailored for carriers, data centers, telecommunications partners, commercial customers, service providers, and institutions. Optic Zoo Networks' infrastructure is designed to meet or exceed the stringent requirements of major carriers and discerning data centers across Canada, making it a key player in the telecommunications landscape. As of January 2018, it operates as a subsidiary of Zayo Group Holdings, Inc.

Viatel Technology Group, a member of the Digiweb Group, is an Ireland-based telecommunications company established in 1991. It specializes in providing a range of services, including voice, data connectivity, data center solutions, and managed WAN services. Viatel caters to small and medium-sized enterprises, corporate clients, public sector organizations, and wholesale customers by offering cost-effective and tailored telecom solutions. Its connectivity services encompass Ethernet lines, dedicated internet access, broadband, and international connectivity. In the voice segment, the company provides VoIP, inbound services, traditional telephony, unified communications, and contact center solutions. Additionally, Viatel offers data center services such as colocation, dedicated server hosting, and cloud computing. The managed services division includes managed WANs, firewalls, and cloud server solutions, enabling clients to concentrate on their core business activities while benefiting from advanced technology and support.

Neo Telecoms is a telecommunications company that specializes in providing black fiber optic infrastructure and data center services. The company offers high-speed connectivity and a range of optical fiber solutions to enterprises and public organizations. In addition to its core offerings, Neo Telecoms provides international hosting, IP services, private network solutions, and cloud computing services, ensuring reliable and efficient communication and data management for its clients.

FiberLink, LLC, established in 2004 by three independent telephone companies from the Midwest and Anderson Pacific Corporation, specializes in fiber optic transmission services. The company provides optical fiber and connectivity solutions to a diverse range of telecommunications providers, including local telephone exchange companies, cable television providers, cellular carriers, and large business users, as well as some of the largest telecommunications companies globally. In October 2013, FiberLink was acquired by Zayo Group, further enhancing its capabilities in the telecommunications sector.

First Telecom Services, LLC owns and operates fiber optic network of various route miles and fiber miles. It offers fiber network, wireless, fiber collocation, private network, and infrastructure services. The company serves telecommunications, financial, government, education, and healthcare markets. It provides its solutions in Ohio, Pennsylvania, New Jersey, New York, Maryland, Delaware, Michigan, and Washington. The company was formerly known as FirstEnergy Telecom Services, Inc. and changed its name to First Telecom Services, LLC in March 2008. The company was founded in 1996 and is based in Reading, Pennsylvania. As of March 10, 2008, First Telecom Services, LLC operates as a subsidiary of First Communications, Inc.

US Carrier is a regional fiber-based bandwidth services provider with a network that spans the southeastern United States.

FiberGate is a provider of dark fiber services, specializing in the leasing of fiber optic networks. The company focuses on delivering high-capacity connectivity solutions to meet the needs of various clients. In 2012, FiberGate was acquired by Zayo, further enhancing its capabilities and reach in the telecommunications sector.

American Fiber Systems, established in 1999 and headquartered in Rochester, New York, specializes in providing dark fiber metropolitan infrastructure and wholesale transportation services. The company serves carriers and enterprises across the United States, offering a range of solutions including metropolitan fiber optic networking, Ethernet transport, Internet access, managed wavelengths, and TDM transport. Additionally, American Fiber Systems provides SONET ring services, colocation, and VLAN tagging, catering to the growing demand for reliable and high-capacity connectivity in urban areas.

AGL Networks dark-fiber telecommunications business.

NTI, which was founded in 1999 and operated 1,500 miles of carrier class fiber, will become part of Zayo Bandwidth. The unit provides fiber-based bandwidth solutions to carriers, web-centric companies, public and educational institutions and enterprises and includes private line, wavelength, Ethernet, Internet and colocation.

Columbia Fiber Solutions is a company that was acquired by Zayo in 2008.

CenturyTel Markets is a provider of communications, high-speed Internet and entertainment services.

Onvoy, a subsidiary of Communications Infrastructure Investments, LLC, was established in 1991 to deliver tandem and long-distance services to local exchange carrier (LEC) end offices in Minnesota. Over the years, the company has expanded its offerings to include SS7 and Database Services, Toll-Free services, Call Management Services, and Transit Services. Onvoy now provides Direct Inward Dialing (DID) services on a nationwide scale and serves as a comprehensive provider for various carriers, including Voice over Internet Protocol (VoIP) providers, rural local exchange carriers (RLECs), and competitive local exchange carriers (CLECs).

PPL Telecom is a company that was acquired by Zayo in 2007.