XO Communications

XO Communications, LLC, previously Nextlink Communications, Concentric Network Corporation and Allegiance Telecom, Inc., was an American telecommunications company. It was purchased and replaced by Verizon Communications.

XO Communications, LLC

Trade name	XO
Company type	Subsidiary
Industry	Telecommunications
Predecessors	Nextlink Communications Concentric Network Corporation Allegiance Telecom, Inc.
Founded	July 4, 1996; 28 years ago (1996-07-04) in Bellevue, Washington
Fate	Replaced by Verizon
Successor	Verizon Communications
Headquarters	Herndon, Virginia , U.S.
Areas served	Primarily the United States, South America, Europe, Middle East, Asia and Oceania
Key people	Chris Ancell, CEO Amador Lucero, COO
Products	VoIP services, Network Services, Hosted Services, Carrier / Wholesale
Website	www.xo.com

Services

XO provided managed and converged Internet Protocol (IP) network services for small and medium-sized enterprises.^[1] XO delivered services through a mix of fiber-based Ethernet and Ethernet over Copper (EoC).^[2] In addition, the company had external network-to-network interface (E-NNI) agreements with traditional carriers and cable companies.^[2]

Acquisition

In a news release dated February 22, 2016, Verizon announced plans to acquire XO Communications' "fiber-optic network business."^[3][4] In 2017, Verizon completed its $1.8 billion acquisition of XO Communications.^[5][6] As of summer 2020 all XO services have been migrated to Verizon.