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. WorldCom grew largely by acquiring other telecommunications companies, including MCI Communications in 1998, and filed bankruptcy in 2002 after an accounting scandal, in which several executives, including CEO Bernard Ebbers, were convicted of a scheme to inflate the company's assets. In January 2006, the company, by then renamed MCI, was acquired by Verizon Communications and was later integrated into Verizon Business.
WorldCom was originally headquartered in Clinton, Mississippi before relocating to Ashburn, Virginia when it changed its name to MCI.
In 1983, in a coffee shop in Hattiesburg, Mississippi, Bernard Ebbers and three other investors formed Long Distance Discount Services, Inc. based in Jackson, Mississippi and in 1985, Ebbers was named chief executive officer. The company acquired over 60 telecommunications firms, and in 1995, it changed its name to WorldCom.
In 1989, it became a corporation as a result of a merger with Advantage Companies Inc. The company name was changed to LDDS WorldCom in 1995, and it relocated to Clinton, Mississippi.
The company grew rapidly in the 1990s, after completing several mergers and acquisitions.
WorldCom's first major acquisition was in 1992 with the $720 million acquisition of Advanced Telecommunications Corporation, outbidding larger rivals Sprint Corporation and AT&T to secure the deal, making WorldCom a larger player in the telecoms market.
Other acquisitions included: Metromedia Communication Corp. and Resurgens Communications Group in 1993, IDB Communications Group, Inc (1994), Williams Technology Group, Inc. (1995), and MFS Communications Company (1996), and MCI in 1998. The acquisition of MFS included UUNET Technologies, Inc., which had been acquired by MFS shortly before the merger with WorldCom. In February 1998, WorldCom acquired CompuServe from its parent company H&R Block.