From 1993 to 2000 WorldCom bought or merged the following companies:
• Advanced Communication Corp. (1992)
• Metromedia Communication Corp. (1993)
• Reurgens Communications Group (1993)
• IDB Communications Group, Inc. (1994)
• Williams Technology Group, Inc. (1995)
• MFS Communications Company (1996), which owned local network access facilities via digital fiber optic cable networks in and around U.S. and European cities, and UUNet technologies, an internet access provider for business.
• On November 10, 1997, WorldCom and MCI Communication announced their US$37 billion merger to form MCI WorldCom.
• In 1998 WorldCom complete three mergers: with MCI Communications ($40 billion), the largest in history at that time, Brooks Fiber Properties ($1.2 billion) and CompuServe ($1.3 billion).
• Intermedia Communications (2001), a provider of data and internet services to businesses
On October 5, 1999 Sprint Corporation and WorldCom announced a $129 billion agreement between the two companies. However, the deal did not get approval because U.S. and European regulators blocked the proposed merger on concerns of monopoly creation.
After the MCI acquisition in 1998, the telecommunications industry entered a downturn and WorldCom suffered a serious storm when it was forced to abandon its