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MCI Logo
MCI CB Rank
582395
Heat Score
21
MCI Communications was the second-largest long-distance telecommunications service provider in the U.S. until its purchase by WorldCom. 
Acquired by
Verizon Logo
Verizon
Founded
obfuscation
Private Washington, District of Columbia, United States10001+ www.mci.com
Communications Infrastructure
Information Technology
Network Hardware
Telecommunications
Wireless