MCI Communications

MCI Communications Corp. was an American telecommunications company that was instrumental in legal and regulatory changes that led to the breakup of the AT&T; monopoly of American telephony and ushered in the competitive long-distance telephone industry. It was headquartered in Washington, D.C. Founded in 1963, it grew to be the second-largest long-distance provider in the U.S. It was purchased by WorldCom in 1998 and became MCI WorldCom, with th... More
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Organization

Address

MCI Communications Headquarters

22001 Loudoun County Pkwy.
Ashburn Virginia 20147
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