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2. 1-800-COLLECT - Wikipedia

   en.wikipedia.org/wiki/1-800-COLLECT

   1-800-COLLECT is a fixed rate collect calling service in the US and Canada, launched by MCI in 1993. Learn how it competed with AT&T and local phone companies, and how it became a popular and controversial brand in the 1990s.

3. Toll-free telephone number - Wikipedia

   en.wikipedia.org/wiki/Toll-free_telephone_number

   Learn about the history and features of toll-free numbers, which are billed for all arriving calls and identified by a dialing prefix. Find out how to get a toll-free number in different countries and regions, such as 0800 in the UK.

4. Toll-free telephone numbers in the North American Numbering ...

   en.wikipedia.org/wiki/Toll-free_telephone...

   Learn about the history, assignment, and operation of toll-free telephone numbers in the North American Numbering Plan, which have the area code prefixes 800, 833, 844, 855, 866, 877, and 888. Find out how to call or get a toll-free number in the U.S. or Canada, and what are the special cases and restrictions.

5. Contact AOL customer support

   help.aol.com/articles/account-management...

   Find out how to get live expert help with your AOL needs, from email and passwords, technical questions, mobile email and more. You can also access 24/7 phone support if you are a paid member by calling 1-800-827-6364.

6. Long-distance calling - Wikipedia

   en.wikipedia.org/wiki/Long-distance_calling

   Learn what a long-distance call or trunk call is and how it differs from a local call. Explore the history of long-distance calling from the first test in 1876 to the first transcontinental call in 1915 and the first international call in 1963.

7. North American Numbering Plan - Wikipedia

   en.wikipedia.org/wiki/North_American_Numbering_Plan

   The North American Numbering Plan (NANP) is a telephone numbering system for twenty-five regions in twenty countries, primarily in North America and the Caribbean. It uses a three-digit area code to identify each numbering plan area (NPA) and a seven-digit telephone number for each subscriber.