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555 (telephone number) The telephone number prefix 555 is a central office code in the North American Numbering Plan, used as the leading part of a group of 10,000 telephone numbers, 555-XXXX, in each numbering plan area (NPA) (area code). It has traditionally been used only for the provision of directory assistance, when dialing NPA-555-1212.
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", [1] although its official name is "directory assistance".
Nextdoor Holdings, Inc. Nextdoor Holdings, Inc. is an American company that operates a hyperlocal social networking service for neighborhoods. The company was founded in 2008 and is based in San Francisco, California. Nextdoor launched in the United States in October 2011, [3] and is available in 11 countries as of May 2023. [4]
The Domain Name System ( DNS) is a hierarchical and distributed name service that provides a naming system for computers, services, and other resources in the Internet or other Internet Protocol (IP) networks. It associates various information with domain names (identification strings) assigned to each of the associated entities.
Ancestry.com LLC is an American genealogy company based in Lehi, Utah.The largest for-profit genealogy company in the world, it operates a network of genealogical, historical records, and related genetic genealogy websites.
Plenty of Fish. Plenty of Fish ( POF) is a Canadian online dating service, popular primarily in Canada, the United Kingdom, the Republic of Ireland, Australia, New Zealand, Spain, Brazil, [2] and the United States. [3] It is available in nine languages. The company, which is based in Vancouver, British Columbia [4] generates revenue through ...
Srinivasa Ramanujan developed the idea of taxicab numbers. In mathematics, the n th taxicab number, typically denoted Ta ( n) or Taxicab ( n ), is defined as the smallest integer that can be expressed as a sum of two positive integer cubes in n distinct ways. [1] The most famous taxicab number is 1729 = Ta (2) = 1 3 + 12 3 = 9 3 + 10 3, also ...
Number line. The order of the natural numbers shown on the number line. In elementary mathematics, a number line is a picture of a graduated straight line that serves as visual representation of the real numbers. Every point of a number line is assumed to correspond to a real number, and every real number to a point. [1]