John Calys

XO Holdings, Inc. delivers an array of telecommunications services to business customers. It serves services telecommunications provider, business and government markets. The company was founded in 1994 and is headquartered in Herndon, VA.

Sprint Communications LLC engages in provision of comprehensive range of wireless and wireline communications services. It also offers 4G wireless broadband services. The company was founded by Cleyson Brown on November 15, 1938 and is headquartered in Bellevue, WA..

Nextel Communications, Inc. is a provider of wireless communications services in the United States

Ernst & Young LLP engages in the provision of accounting, assurance, tax, transaction, and advisory services. It specializes in the actuarial, analytics and big data, cyber security, accounting compliance and reporting, center for board matters, international financial reporting standards, country tax advisory, global trade, tax accounting, and climate change and sustainability. The company was founded in 1989 and is headquartered in New York, NY.

Global Registration Services Ltd. engages in the provision of business support services for revenue delivery, technology operations, sale support, and product management sectors. The company was founded on November 4, 1997 and is headquartered in London, the United Kingdom.

XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA.