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  2. Fictitious telephone number - Wikipedia

    en.wikipedia.org/wiki/Fictitious_telephone_number

    In North America, the area served by the North American Numbering Plan (NANP) system of area codes, fictitious telephone numbers are usually of the form (XXX) 555-xxxx. The use of 555 numbers in fiction, however, led a desire to assign some of them in the real world, and some of them are no longer suitable for use in fiction.

  3. Random number generation - Wikipedia

    en.wikipedia.org/wiki/Random_number_generation

    Dice are an example of a mechanical hardware random number generator. When a cubical die is rolled, a random number from 1 to 6 is obtained. Random number generation is a process by which, often by means of a random number generator (RNG), a sequence of numbers or symbols that cannot be reasonably predicted better than by random chance is generated.

  4. Telephone - Wikipedia

    en.wikipedia.org/wiki/Telephone

    An old rotary dial telephone. AT&T push button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice ...

  5. Telephone numbers in Europe - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Europe

    Calling codes in Europe. Telephone numbers in Europe are managed by the national telecommunications authorities of each country. Most country codes start with 3 and 4, but some countries that by the Copenhagen criteria are considered part of Europe have country codes starting on numbers most common outside of Europe (e.g. Faroe Islands of Denmark have a code starting on number 2, which is most ...

  6. Telephone numbers in Singapore - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Singapore

    Telephone numbers in Singapore, also known as the National Numbering Plan, are regulated by the Info-communications Media Development Authority (IMDA). Due to the small geographical size of Singapore, there are no area or trunk codes; all numbers belong to one numbering area, and thus come in the same 8-digit format.

  7. E.123 - Wikipedia

    en.wikipedia.org/wiki/E.123

    E.123. E.123 is an international standard by the standardization union ( ITU-T ), entitled Notation for national and international telephone numbers, e-mail addresses and web addresses. [1] It provides guidelines for the presentation of telephone numbers, email addresses, and web addresses in print, on letterheads, and similar purposes.

  8. Telephone numbers in Turkey - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Turkey

    Telephone numbers in Turkey went from six (2+4) to seven digits (3+4) local phone numbers c.1988, at which time Ankara went from 41 to 4. There used to be more than 5,000 local area codes of varying lengths (one to five digits) with correspondingly varying local number lengths (seven to three digits).

  9. Telephone numbers in the Netherlands - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    Geographical telephone numbers. Since the reorganization of the telephone system in 1995, Dutch geographical numbers consist of 9 digits. The numbering plan implements a system of area codes. An area code consists of two or three digits. The larger cities and areas have two digits with a subscriber number of seven digits, permitting more local ...