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Mobile phones. Within Australia, mobile phone numbers begin with 04 or 05 – the Australian national trunk code 0, plus the mobile indicator 4 or 5 – followed by eight digits. This is generally written as 04XX XXX XXX within Australia, or as +61 4XX XXX XXX for an international audience.
Fictitious numbers in (011x) and (01x1) area codes mostly end with the digits 496 0xxx, however Tyneside uses (0191) 498 0xxx. London uses 020 7946 0xxx; Cardiff uses 029 2018 0xxx; and Northern Ireland now uses 028 9649 6xxx after a previously reserved range was allocated for actual use.
However, generally they are considerably slower (typically by a factor 2–10) than fast, non-cryptographic random number generators. These include: Stream ciphers. Popular choices are Salsa20 or ChaCha (often with the number of rounds reduced to 8 for speed), ISAAC, HC-128 and RC4. Block ciphers in counter mode.
Mobile telephone numbers. [1] [2] In Vietnam, mobile phone numbers follow the format 09x-xxxxxxx or new prefixes: 03x, 05x, 07x, 08x. The first 0 is the trunk code. The next 2 digits ( 3x, 5x, 7x, 8x or 9y) specify the mobile phone operator. Some mobile phone operators have been given more than one operator code. In Circular No. 22/2014/TT ...
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.
Most Australian telephone numbers have ten digits, and are generally written 0A BBBB BBBB or 04XX XXX XXX for mobile telephone numbers, where 0A is the optional "area code" (2,3,7,8) and BBBB BBBB is the subscriber number.
Telephone numbers in Portugal. Portugal changed to a closed telephone numbering plan on 31 October 1999; previously, the trunk prefix was '0', but this was dropped. [1] For landline subscribers, the area code, prefixed by the digit '2', was incorporated into the subscriber's number. For mobile subscribers, formerly seven (to call another ...
Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.