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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
A "data base communication call processing method" [2] patented by Roy P. Weber of Bell Labs, and implemented by AT&T in 1982, broke the link between individual telephone numbers and a specific trunk, city, or carrier. A toll-free number was merely an index into a large, distributed database; any number could be reassigned geographically ...
The American Telephone & Telegraph Company (AT&T) first introduced 800 toll-free service in 1967. [2] When AT&T was the only Interexchange carrier, local exchange carriers automatically routed all toll-free calls directly to an AT&T point of presence without performing a translation from the toll-free number to the terminating telephone number. [3]
800-290-4726 more ways to ... information you can provide — by using the website’s filtering tools. 2. BeenVerified ... friendly free reverse phone number lookup site that provides searchers ...
800-290-4726 more ways to reach us. Sign in. Mail. ... Scammer phone number lookup: ... your local carrier gives the call to a long-distance provider. That long-distance provider then covers the ...
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 ...
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 ...
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