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Service Numbers

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.

Log in to Online Account Manager

Service Phone Number Link
Consumer Numbers
Long Distance Customer Service
Local Customer Service
  
1-800-444-3333
1-888-MCI-LOCAL
(1-888-624-5622)
  
www.mci.com/service
www.mci.com/service
Worldwide Access Numbers
English
Spanish
  
1-800-955-0925
1-800-950-4652
 Toll-free access numbers
Other Numbers
Prepaid Calling Services
1-800-COLLECT
10-10-220
  
 
1-800-444-3333
1-800-540-3598
  
www.mci.com/prepaid
www.1800COLLECT.com
www.1010220.com
Existing customers should have their account number available when calling.


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