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.

Customer Service
Pay Bill

If you are an MCI Business Complete customer you can relax knowing your account is always up-to-date. Choose an EasyPay automatic billing solution using your credit card or direct debit, and you'll save $1 every month plus earn up to 60 free minutes!*


To mail your payment, send check or money order to the following address:

MCI
PO Box 16801
Newark, NJ 07101-6801

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Check Voicemail

Your MCI account offers convenient message notification and retrieval options.  Receive new voicemail message alerts via your pager, cell phone, or e-mail.  Access your messages wherever you are, by phone or on the web.

Set up email/text notifications for Voicemail.

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Service Phone Numbers

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
Contact Us

Questions about MCI Small Business products?  Use our easy online form to submit your inquiry.

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* 60 free minutes offer applies to new EasyPay customers only.  Offer does not apply to unlimited or block-of-time calling plans.