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https://en.wikipedia.org/wiki/MCI_Communications
https://en.wikipedia.org/wiki/MCI_Inc.
https://craft.co/mci-communications-corporation
The company serves large corporations, local, state, and federal government agencies, small businesses, and individual residential customers. MCI Communications was founded in 1968 and is headquartered in Washington, DC, US Report incorrect company information MCI Communications Office Locations MCI Communications has an office in …
Global business and residential communications company operating in more than 65 countries.
https://www.wearemci.com/en-us/company
We are an independently owned agency, headquartered in Geneva, Switzerland, with a global presence of 60 offices in 31 countries. MCI’s US headquarters is in the Washington, DC area with offices in New York, Miami, Baltimore, Dallas, and Chicago. 30+ YEARS OF EXPERIENCE 60 OFFICES 31 COUNTRIES 5,500 CAMPAIGNS AND ACTIVATIONS ANNUALLY Sustainability
https://www.dnb.com/business-directory/company-profiles.mci_communications_corporation.930a7156a7f25af14a4461908eb40eb1.html
Company Description: MCI Communications Corporation is located in Ashburn, VA, United States and is part of the Other Telecommunications Industry. MCI Communications Corporation has 39,000 total employees across all of its locations and generates $1.42 billion in sales (USD). (Sales figure is modelled).
https://www.linkedin.com/company/mci-communications-corporation
MCI Telecommunications Corporation | 239 followers on LinkedIn. MCI is (was) a provider of long distance voice and data services, nation wide. ... Headquarters Richardson, TX
https://www.wearemci.com/en-us/new-contact
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http://consumer.mci.com/customer_service/Service_Numbers.jsp
If you are a current MCI Consumer customer, you can log in to our secure customer website to access your account information or e-mail Customer Service. Log in to Online Account Manager. Consumer Numbers Long Distance Customer Service Local Customer Service 1-800-444-3333 1-888-MCI-LOCAL
https://www.bbb.org/us/va/ashburn/profile/telephones/mci-inc-0241-11839
MCI's headquarters is in Ashburn, Virginia. Verizon is headquartered in New York, NY. According to information provided by the company, MCI Communications Corporation (MCC) was incorporated in...
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