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

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

   The SMS/800 database and RespOrg structure are used in the U.S. and Canada. A few specific exchanges remain reserved or are assigned to specific North American Numbering Plan countries which do not draw numbers from the SMS/800 pool: Some 800-NXX prefixes are reserved for the following areas: 800-389 for the Bahamas; 800-534 for Barbados

3. Toll-free telephone number - Wikipedia

   en.wikipedia.org/wiki/Toll-free_telephone_number

   800 toll-free numbers are commonly called "800 免费电话". The official name is "被叫集中付费业务" (called party collect paid service), which means the cost of the call is borne not by the caller but by the party receiving the call. 800-toll-free numbers in China are ten-digit numbers beginning with "800". There is no prefix before ...

4. RespOrg - Wikipedia

   en.wikipedia.org/wiki/RespOrg

   By 1967, a direct-dial 1-800-number could be provided using Wide Area Telephone Service (WATS), but each prefix was tied to a specific geographic destination and each number was installed with special fixed-rate trunks which were priced beyond the reach of most small businesses.

5. Somos, Inc. - Wikipedia

   en.wikipedia.org/wiki/Somos,_Inc.

   Toll-free telephone service is a telecommunication service in which subscribers are assigned telephone number in NPAs 800, 888, 877, 866, 855, 844, and 833. Calls to these numbers incur no toll charges for callers. The American Telephone & Telegraph Company (AT&T) first introduced 800 toll-free service in 1967. [2]

6. Toll-free number portability - Wikipedia

   en.wikipedia.org/wiki/Toll-free_number_portability

   The system was redesigned in 1981 to use a database, the SMS/800 service management system, which could direct any toll-free number to any destination based on various conditions; number prefixes remained tied to specific carriers until a RespOrg (responsible organization) structure was introduced in 1993 (US) and 1994 (Canada) to allow ...

7. Call now! That’s 1-800-ChatGPT - AOL

   www.aol.com/finance/openai-says-not-using-voice...

   Users in the U.S. and Canada could call a toll-free number for information like the address, contact information, and hours of a particular business in town, or a list of shops or restaurants that ...