XO Communications is a Network provider which also has a number of datacenters nation wide.

  • 20,000-route mile national inter-city network
  • 1.2 million metro fiber miles
  • More than 4,000 on-net buildings
  • More than 1,000 unique central offices
  • Extensive reach providing data services through a variety of options to business locations in North and South America, Europe, Africa, and Asia/Pacific regions.

The company, initially named NEXTLINK, first launched voice communications services on July 4, 1996. In the wake of the Telecommunications Act of 1996 , NEXTLINK was one of the first Competitive Local Exchange Carriers (CLECs) in the United States. Its core operations office was located in Bellevue, Wash., and the company at that time served seven markets in three states.

During the late 1990s, the company rapidly expanded into major markets across the United States, and became the largest LMDS license holder in the country through the historic FCC spectrum auction in 1998. In 2000, NEXTLINK acquired Concentric Network Corporation, the nation’s third largest independent Internet service provider. The combined company was renamed XO Communications to signify its transformation into a full-service, integrated broadband communications provider. That same year, XO established its headquarters in Northern Virginia. Today, XO offers comprehensive data networking, cloud connectivity, unified communications, voice, Internet and managed services to businesses in 85 markets across the United States.

In addition to the 85 markets served in the United States, XO extends service to more than 50 countries via a variety of partners through points of presence in Amsterdam, Frankfurt, Hong Kong, London and Toronto. The company has 1.5 million fiber strand miles in its network, including approximately 20,000 route-miles of intercity and 13,500 route-miles of metro fiber. XO also has added direct fiber-connected buildings onto its network and now has nearly 5,000 On-Net buildings.

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Parent Company:
13865 Sunrise Valley Dr., Herndon, VA 20171
Company Type:


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XO Locations

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XO Atlanta
4000 Highland Parkway SE
Atlanta, GA 30082
Located in Atlanta
  • 1.33 Megawatts
XO Chicago (Swift Dr)
1808 Swift Road
Oak Brook, IL 60523
Located in Chicago: Suburban
  • 0.22 Megawatts
  • Does not own Owns the Building
XO Chicago (Oak Brook)
810 Jorie Boulevard
Oak Brook, IL 60523
Located in Chicago: Suburban
  • 0.99 Megawatts
XO Dallas
1300 West Mockingbird Lane
Dallas, TX 75247
Located in Dallas
  • 1,700 Gross SqFt
  • 1.7 Megawatts
XO Denver
313 Inverness Way South
Englewood, CO 80112
Located in Denver
  • 0.69 Megawatts
XO Los Angeles (600 West 7th)
600 West 7th Street
Los Angeles, CA 90017
Located in Los Angeles
  • Does not own Owns the Building
XO Los Angeles (818 West 7th)
818 West 7th Street
Los Angeles, CA 90017
Located in Los Angeles
  • Does not own Owns the Building
XO Miami
16583 NW 15th Avenue
Miami, FL 33169
Located in Miami
  • 0.68 Megawatts
XO New York (111 8th)
111 8th Avenue
New York, NY 10011
Located in New York
  • 4.32 Megawatts
  • Does not own Owns the Building
XO New York (60 Hudson)
60 Hudson Street
New York, NY 10013
Located in New York
  • 1.0 Megawatts
  • Does not own Owns the Building


XO Facility in Maryland Heights
Posted in XO St Louis 2020 Westport