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

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

   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 code in the group NXX for various other purposes. Calls to the toll-free numbers are charged to the receiving party, and are free to the caller if dialed from land-line telephones, but may incur ...

3. Toll-free telephone number - Wikipedia

   en.wikipedia.org/wiki/Toll-free_telephone_number

   The +800 UIFN service is one of three ITU-administered non-geographic codes with a similar numbering scheme. The +808 Universal International Shared Cost Number (UISCN), billed at the price of a domestic call, shares the same eight-digit format; the +979 Universal International Premium Rate Number (UIPRN), billed at a high premium cost, carries ...

4. 1-800 Contacts - Wikipedia

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

   1-800 Contacts was also involved in several lawsuits against Lens.com, Inc., including a trademark cancellation case in the United States Court of Appeals for the Federal Circuit, Lens.com, Inc. v. 1-800 Contacts, Inc., in which the Court determined that Lens.com's trademark "LENS", held in connection with "computer software", had been abandoned because Lens.com merely used software to sell ...

5. List of North American Numbering Plan area codes - Wikipedia

   en.wikipedia.org/wiki/List_of_North_American...

   Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.

6. List of emergency telephone numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_emergency...

   Various services available through regional or national N11 codes (e.g.: 311 for non-emergency police or city services) in certain areas. Calling #77 from a mobile phone may reach the highway patrol in some states. [29]

7. Telephone numbers in the Americas - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbers_in_the...

   The prefixes in the Americas start with one of 1,2,5. All countries in the Americas use codes that start with "5", with the exception of the countries of the North American Numbering Plan, such as Canada and the United States, which use country code 1, and Greenland and Aruba with country codes starting with the digit "2", which mostly is used by countries in Africa.