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From many countries, such as the U.K., U.S. toll-free numbers can be dialed, but the caller first gets a recorded announcement that the call is not free; in fact, on many carriers, the cost of calling a "toll-free" number can be higher than that of calling a normal number.
Callers dial 1-800 (888 or 866)-FREE411 [373-3411] from any phone in the United States to use the toll-free service. Sponsors cover part of the service cost by playing advertising messages during the call. Callers always hear an ad at the beginning of the call, and then another after they have made their request.
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]
Free: Free Caraïbe: Not operational: UMTS 900 / UMTS 2100 / LTE 800 / LTE 1800 / LTE 2600: MNC withdrawn [79] 340: 08: Dauphin: Dauphin Telecom: Operational: GSM 900 / GSM 1800 / UMTS / LTE: Saint Barthélemy, Saint Martin: 340: 09: Free: Free Caraïbe: Upcoming: UMTS 900 / UMTS 2100 / LTE 800 / LTE 1800 / LTE 2600 [80] [2] 340: 10: SRIR ...
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The industry established a body, Industry Number Management Services (INMS) Ltd, to allocate individual numbers and administer the centralised reference database of all allocated local rate and freephone numbers. [1] Vanity numbers, such as phonewords or short 13- series shared-cost service numbers, are made available by auction.