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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", [ 1 ] although its official name is "directory assistance".
Some forms of city directories provide this form of lookup for listed services by phone number, along with address cross-referencing. Publicly accessible reverse telephone directories may be provided as part of the standard directory services from the telecommunications carrier in some countries.
411 LDA: Local Directory Assistance. 411 is dialed, and the operator is requested to search for a listing in a group of area codes local to the caller . Example: the caller lives in area code 630 (Oak Brook, Illinois) and requests a listing for a business in area code 312 (Chicago, Illinois). In this case, AT&T Illinois bills the call.
Reverse lookup is a procedure of using a value to retrieve a unique key in an associative array. [1] Applications of reverse lookup include reverse DNS lookup, which provides the domain name associated with a particular IP address, [2] reverse telephone directory, which provides the name of the entity associated with a particular telephone ...
Historically known for distributing yellow pages phone books across Canada, into the 21st century YPG has primarily shifted to digital marketing services, though they also operate the YellowPages.ca local business search engine and Canada411 online phone directory, [1] [2] and still print phone books on a limited basis to some customers as of 2024.
Callers then identify the city and state for the desired information, and can then search either by name or by business type. Free directory assistance is also available from an application for the iPhone and Android mobile phones, [2] and from their website. The service, provided entirely by computer and with no human operators, uses a voice ...
The Government of Canada's Translation Bureau recommends using hyphens between groups; e.g. 250-555-0199. [2] Using the format specified by the International Telecommunication Union (ITU) in Recommendation E.164 for telephone numbers, a Canadian number is written as +1NPANXXXXXX , with no spaces, hyphens, or other characters; e.g. +12505550199 .
411 may refer to: The year AD 411, the four hundred and eleventh year of the Gregorian calendar; 411 BC; 4-1-1, a telephone directory assistance number in the United States and Canada By extension, a slang term for "information" 411.com, a Reverse telephone directory web property of Whitepages (company)