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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 code in the group NXX for various other purposes.
Calling an 800-number is free of charge. Calling a 400-number incurs a local access charge. 800-numbers are accessible only to land-line subscribers, while 400-numbers are accessible to all land-line and mobile users. 800-toll-free numbers. 800 toll-free numbers are commonly called "800 免费电话".
Comparison of Microsoft Windows versions. Microsoft Windows is the name of several families of computer software operating systems created by Microsoft. Microsoft first introduced an operating environment named Windows in November 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces (GUIs).
RespOrg. A RespOrg, or responsible organization, is a company that maintains the registration for individual toll-free telephone numbers In the North American Numbering Plan by means of the distributed Service Management System/800 database. RespOrgs were established in 1993 as part of a Federal Communications Commission order instituting toll ...
In 2002, the first Multimedia Messaging Service (MMS) was introduced and the first GSM network in the 800 MHz frequency band became operational. Enhanced Data rates for GSM Evolution (EDGE) services first became operational in a network in 2003, and the number of worldwide GSM subscribers exceeded 1 billion in 2004.
800-72-856 780: 1220: 71-850 760: 1210: 70-843 745: 1114: 68-837 725: 1060: 67-829 712: 1021: 66-824 682: 940: 65-812 668: 905: 64-806 652: 867: 63-799 626: 803: 62-787 614: 775: 61-782 601: 746: 60-776 590: 727: 59-770 576: 694: 57-763 552: 649: 56-751 545: 639: 55-748 529: 606: 54-739 514: 587: 53: 120: 731 502: 565: 52: 119: 724 495: 551: 51 ...
Sheraton's 800‑325‑3535, one of the notable early adopters in late 1969, was hard-wired into St. Louis area code 314; 1‑800‑HOLIDAY at that time could not be a U.S. number if the 1‑800‑465 prefix was hard-wired to Thunder Bay's area code 807. Any attempt to call a foreign 1‑800 gave a pre-recorded error, "the number you have ...
These are known in the industry as "central reservations offices". Staff members at these call centres take calls from clients wishing to make reservations or other inquiries via a public number, usually a 1-800 number. These centres may operate as many as 24 hours per day, seven days a week, depending on the call volume the chain receives.
800 number portability means that toll-free numbers are no longer associated with a particular telephone carrier such as AT&T or MCI. 800 subscribers can switch to another carrier without changing their toll-free number.
800-The-Info (or 1-800-843-4636) was a toll-free directory assistance (DA) and information service provided in the United States by Verizon. 800-The-Info was subsidized by businesses that purchase advertising space on the service. Callers did not pay for the service, but had to listen to ads.
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