The corporate address of MCI Communications is listed below. This address may be home address or customer service address, usually including street, city (town), state (province), zip code(postal code), etc. It is recommended that you first confirm this address through support email or customer service phone number. If your product (service) needs support, it is recommended to obtain support through customer service phone and support email. view all customer service contact information.
MCI Communications Overview
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.[1]
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 the name afterwards being shortened to WorldCom in 2000. WorldCom's financial scandals and bankruptcy led that company to change its name in 2003 to MCI Inc. The MCI name disappeared in January 2006 after the company was bought by Verizon.
| Industry | Telecommunications |
| Headquarters | Washington, DC |
| Company size | 10,001+ employees |