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

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

   Toll-free telephone numbers in the North American Numbering Plan. Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing ...

3. North American Numbering Plan - Wikipedia

   en.wikipedia.org/wiki/North_American_Numbering_Plan

   International access. 011. List of dialing codes. The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably ...

4. Wide Area Telephone Service - Wikipedia

   en.wikipedia.org/wiki/Wide_Area_Telephone_Service

   [2] [3] These lines were most often connected to private branch exchanges in large businesses. WATS lines were the basis for the first direct-dial toll-free 1-800-numbers (intrastate in 1966, [4] interstate in 1967); by 1976, WATS brought AT&T Corporation a billion dollars in annual revenue ($5.35 billion in 2023 dollars)

5. Toll-free telephone number - Wikipedia

   en.wikipedia.org/wiki/Toll-free_telephone_number

   A toll-free telephone number or freephone number is a telephone number that is billed for all arriving calls. For the calling party, a call to a toll-free number from a landline is free of charge. A toll-free number is identified by a dialing prefix similar to an area code. The specific service access varies by country.

6. Long-distance calling - Wikipedia

   en.wikipedia.org/wiki/Long-distance_calling

   By the 1980s, computerisation of the system allowed British Telecom "Linkline" 0800 freephone numbers and AT&T +1-800- toll-free numbers to be controlled by a database and terminated virtually anywhere with each inbound call itemised and billed individually. This smart network was further refined to provide toll-free number portability in the ...

7. Area code 900 - Wikipedia

   en.wikipedia.org/wiki/Area_code_900

   Area code 900 is a telephone area code in the North American Numbering Plan for premium-rate telephone numbers. Area code 900 was installed in 1971. [1] Premium rate services are dialed in the format 1-900-XXX-XXXX. This is often called a 900 number or a 1 900 number ("one-nine-hundred"). A call to a 900-number can result in high per-minute or ...