411 (telephone Number)
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411 (telephone Number)
''411'' is a telephone number for local directory assistance in Canada and the United States. Until the early 1980s, ''411'' – and the related ''113'' number – were free to call in most jurisdictions. In the United States, the service is commonly known as "information", although its official name is "directory assistance". History The ''411'' number has been in use since at least 1930 in New York City, San Francisco, and other large cities where panel switch, panel and Number One Crossbar Switching System, crossbar Telephone exchange, switching equipment installed by the Bell System was prevalent. However, in smaller Bell System cities as well as almost all areas served by GTE and other companies where Strowger switch, step-by-step equipment was the norm such as Los Angeles, ''113'' was used until at least the 1960s, and in some cases (the Pacific Northwest, for example) until the mid-1980s. In Canada and the United States, directory assistance was historically a local functi ...
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Telephone Number
A telephone number is the address of a Telecommunications, telecommunication endpoint, such as a telephone, in a telephone network, such as the public switched telephone network (PSTN). A telephone number typically consists of a Number, sequence of digits, but historically letters were also used in connection with telephone exchange names. Telephone numbers facilitate the switching and routing of telephone call, calls using a system of destination code routing. Telephone numbers are entered or dialed by a calling party on the originating telephone set, which transmits the sequence of digits in the process of signaling to a telephone exchange. The exchange completes the call either to another locally connected subscriber or via the PSTN to the called party. Telephone numbers are assigned within the framework of a national or regional telephone numbering plan to subscribers by telephone service operators, which may be commercial entities, state-controlled administrations, or ot ...
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