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Private company

MCI Communications

Logo: MCI Communications, Public domain, via Wikimedia Commons3

Former telecommunications and networking company

MCI Communications Corporation (originally Microwave Communications, Inc.) was an American telecommunications company headquartered in Washington, D.C. that was at one point the second-largest long-distance provider in the United States. MCI was instrumental in legal and regulatory changes that led to the breakup of the Bell System and introduced competition in the U.S. telephone industry.2 It ceased to exist in 1998.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1963Founded1
  • Industrytelecommunications industry1
  • HeadquartersWashington, D.C.1

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MCI Communications Corporation (originally Microwave Communications, Inc.) was an American telecommunications company headquartered in Washington, D.C. that was at one point the second-largest long-distance provider in the United States. MCI was instrumental in legal and regulatory changes that led to the breakup of the Bell System and introduced competition in the U.S. telephone industry.2

Acquisitions

  1. Succeeded by Verizon Business1

Timeline

  1. Sep 15, 1998Dissolved Dissolved1
  2. 1963Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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