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1. consumer.mci.com › customer_service › Service_NumbersMCI Customer Service Numbers

   consumer.mci.com › customer_service › Service_Numbers

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   MCI offers customer support for all your service needs. You may contact our representatives by phone or e-mail using the information below. 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.

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   • MCI Info & Answers

     Find the information you need and answers to frequently...

   • Contact MCI

     Contact MCI. We welcome your feedback and are eager to help...

   • MCI All Products

     MCI Nationwide 200 Plus All long distance calls as low as 5¢...

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     Unlimited calling is for residential voice service only....

2. consumer.mci.com › customer_service › indexCustomer Service - MCI

   consumer.mci.com › customer_service › index

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   Find a Customer Service number. Browse information on MCI's services and find answers to frequently asked questions. Browse Info & Answers. Current MCI customers can get updates, news, and special offers via e-mail. Sign up for E-mail Alerts. Need help deciding? Compare plans.

3. consumer.mci.com › customer_service › ContactUsContact MCI

   consumer.mci.com › customer_service › ContactUs

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   Contact MCI. We welcome your feedback and are eager to help answer your general questions. If you are a current MCI Consumer customer and you have a specific question about your account or need to make account updates, you must log in to our secure customer website to e-mail Customer Service.

4. en.wikipedia.org › wiki › MCI_IncMCI Inc. - Wikipedia

   en.wikipedia.org › wiki › MCI_Inc

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   MCI, Inc. (formerly WorldCom and MCI WorldCom) was a telecommunications company. For a time, it was the second-largest long-distance telephone company in the United States, after AT&T.

5. en.wikipedia.org › wiki › MCI_CommunicationsMCI Communications - Wikipedia

   en.wikipedia.org › wiki › MCI_Communications

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   MCI Communications Corporation (originally Microwave Communications, Inc.) was a telecommunications company headquartered in Washington, D.C. that was at one point the second-largest long-distance provider in the United States.

6. www.verizon.com › about › sitesWorldCom - Verizon

   www.verizon.com › about › sites

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   WorldCom was a leading communications company that was acquired by Verizon Communications in January 2006. Known as MCI at the time of the merger, WorldCom’s network assets are now part of Verizon Business. WorldCom was originally founded in 1983 as Long Distance Discount Service, Inc.

7. People also ask

   How do I contact MCI customer service?

   • You may contact our representatives by phone or e-mail using the information below. 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. Existing customers should have their account number available when calling.

   MCI Customer Service Numbers

   consumer.mci.com/customer_service/Service_Numbers.jsp

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   Where is MCI headquartered?

   • Prior to the acquisition, MCI was headquartered in Ashburn, Virginia. The MCI acquisition provided Verizon with an international long-distance network and several large corporate customers. Along with the merger, a new corporate division, Verizon Business, was created to serve medium and large businesses and government customers.

   WorldCom - Verizon

   www.verizon.com/about/sites/default/files/worldcom/index.html

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   What does MCI stand for?

   • MCI Communications Corporation (originally Microwave Communications, Inc.) was a telecommunications company headquartered in Washington, D.C. that was at one point the second-largest long-distance provider in the United States.

   MCI Communications - Wikipedia

   en.wikipedia.org/wiki/MCI_Communications

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   How do I Manage my MCI account?

   • The most convenient way to manage your MCI account is to handle it yourself - online. View your invoice, make a payment and much more - whenever you like, 24 hours a day, 7 days a week. With MCI, managing your account online is fast and easy. If you need to speak to someone right away, our toll-free Customer Service numbers are accessible below.

   MCI - Customer Service

   business.mci.com/

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8. business.mci.comMCI - Customer Service

   business.mci.com

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   If you'd rather speak to someone directly, the answers to your questions are just a phone call away. Look for the toll-free Customer Service number you need from the link below. Find A Customer Service Number