MCI Communications Timeline of Events

Home / Timelines / MCI Communications

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...

Timeline of Events

1997

11.10.1997

WorldCom and MCI Communications announce a $37 billion merger (the largest merger in US history at the time).

1998

9.14.1998

Telecommunications companies MCI Communications and WorldCom complete their $37 billion merger to form MCI WorldCom.

9.15.1998

With the landmark merger of WorldCom and MCI Communications completed the day prior, the new MCI WorldCom opens its doors for business.