AOL Web Search

MCI PO Box 16801 Newark, NJ 07101-6801 TTI PO Box 15043 Albany, NY 12212-5043 Still having trouble finding what you need? E-mail MCI with your general questions and comments. In most cases we'll respond within 24 business hours. If you have specific account-related questions, please log in to Online Account Manager. Contact us

MCI Communications Corp. (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.

Global business and residential communications company operating in more than 65 countries.

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 .

It's quick and easy! Click below for help with your username or password. Having Trouble Logging In? If you are a Residential Customer, call 1-800-444-3333. If you are a Business Customer, call 1-800-444-2222. Customers previously serviced by TTI National, Inc are unable to use online bill pay.

MCI organically grows, inorganically acquires and operates companies that have a synergistic products and services portfolios, including but not limited to business process outsourcing (BPO), business process management (BPM), IT Services, application software, and technology services.

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 Enterprise Solutions. WorldCom was originally founded in 1983 as Long Distance Discount Service, Inc.

Leader Communications Incorporated (LCI) is an award-winning organization. Based upon LCI’s subset organizational scope, LCI has an (IS0 9001:2015) certified Quality Management System, an (ISO 20000-1:2018) certified Service Management System, and an (ISO 27001:2013) certified Information Security Management System.