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MCI Communications Corporation (originally Microwave Communications, Inc.) was a telecommunications company headquartered in Washington, D.C. that was at one point the second-largest long-distance provider in the United States.
MCI Communications is headquartered in Washington, 1801 Pennsylvania Avenue NW, United States, and has 1 office location.
MCI, Inc. (formerly WorldCom and MCI WorldCom) was a telecommunications company. For a time, it was the second-largest long-distance telephone company in the United States, after AT&T.
Formed on September 15, 1998, from the $37 billion merger of MCI Communications Corporation and WorldCom, Inc., the company's operations are organized around three divisions: MCI WorldCom, U.S. telecommunications; UUNET WorldCom, Internet and technology services; and WorldCom International.
Company profile page for MCI Communications Services Inc including stock price, company news, executives, board members, and contact information.
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WorldCom was a leading communications company that was acquired by Verizon Communications in January 2006. Known as MCI at the time of the merger, WorldCom’s network assets are now part of Verizon Business. WorldCom was originally founded in 1983 as Long Distance Discount Service, Inc.
