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  2. 411 (telephone number) - Wikipedia

    en.wikipedia.org/wiki/411_(telephone_number)

    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".

  3. Telephone numbers in Ghana - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Ghana

    The Ghana telephone numbering plan is the system used for assigning telephone numbers in Ghana. It is regulated by the National Communications Authority, which holds responsibility for telecommunications . Since 1 May 2010, all fixed-line numbers and mobile numbers have 9 national (significant) numbers after the '0' trunk code. [1]

  4. Telephone numbers in Russia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Russia

    With Pre-Select, the subscriber calls a prescribed free number (8-800-333-0990 for MTT or 8-800-100-2525 RT) and signs up initially for service. They may also sign a statement at the phone company indicating their choice of provider. With this provider, the prefixes and dialing procedures for non-local calls are the ones currently in use.

  5. Telephone numbers in Cambodia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Cambodia

    To dial a land line in Cambodia all over the country, the format is Area Code + Phone Number. The area code is 3 digits long, followed by a 6 or 7 digit phone number. Calls made from outside Cambodia must omit the prefix 0. Therefore, to call a land line number in Phnom Penh from other countries, dialing begins with +855 23 followed by 6 or 7 ...

  6. Telephone numbers in Nigeria - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Nigeria

    0, 009. Telephone numbers in Nigeria use an open numbering plan. They are composed of a combination of an area code and a local line or subscriber telephone number. Area codes consist of one digit ( Lagos, Ibadan and Abuja) or two digits. Local telephone numbers contain from five to seven digits, and may vary within the area code.

  7. Keulegan–Carpenter number - Wikipedia

    en.wikipedia.org/wiki/Keulegan–Carpenter_number

    In fluid dynamics, the Keulegan–Carpenter number, also called the period number, is a dimensionless quantity describing the relative importance of the drag forces over inertia forces for bluff objects in an oscillatory fluid flow. Or similarly, for objects that oscillate in a fluid at rest. For small Keulegan–Carpenter number inertia ...

  8. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    268 7xx. 10. NANP member. Argentina. +54. 9/15. 10. All carriers: Claro, Movistar, Personal, Tuenti. 15 before the local number but after long distance area code for national calls (0 11 15 xxxx-xxxx) and 9 placed after the international access code excluding the 15 for international calls (+54 9 11 xxxx-xxxx).

  9. Telephone numbers in Serbia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Serbia

    The country calling code of Serbia is +381. The country has an open telephone numbering plan, with most numbers consisting of a 2- or 3-digit calling code and a 6-7 digits of customer number.