Telephone numbers in Asia have the most possible prefixes of any continent on Earth: 2, 3, 6, 7, 8, 9. Below is a list of country calling codes for various states and ...
Telephone numbers in China are organized according to the Chinese Telephone Code Plan. The numerical formats of landlines and mobile phones are different: landlines have area-codes, whereas mobile phones do not. In major cities, landline-numbers consist of a two-digit area code followed by an eight-digit inner-number.
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History. Until 1985, subscribers' telephone numbers in Singapore were five and six digits. Five digits were introduced in 1960s, whereas 5-digit and 6-digit phone numbers were introduced in 1960s as fixed lines grew, but in that year, these changed to seven digits as the introduction of new towns arose (Tampines, Jurong East, Bukit Batok, Yishun and Hougang) and a large number of new numbers ...
Mobile phone numbers have a total of 10 or 11 digits for postpaid depending on the operator, whereas prepaid services get 11 to 13 digits determined by the operator. Until October 1999, East Timor was included in the Indonesian telephone numbering plan, using the area codes 0390 (for Dili )  and 0399 (for Baucau ).
A telephone number is a sequence of digits assigned to a fixed-line telephone subscriber station connected to a telephone line or to a wireless electronic telephony device, such as a radio telephone or a mobile telephone, or to other devices for data transmission via the public switched telephone network (PSTN) or other public and private networks.
- Fixed-Line Area Codes
- Mobile Phone Area Codes
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Philippine area codes for fixed-line or landline telephones are fixed at two digits, excluding Metro Manila, the province of Rizal and the cities of Bacoor in Cavite and San Pedro in Laguna, which use the area code 2. Some smaller carriers concentrated within a specific geographic area may issue four- or five-digit area codes, but these are being phased out in favour of the standard two-digit area codes. Occasionally, a particular area may change area codes. For example, the City of Bacoor in Cavite has been included in the geographical coverage area of area code 2 per the National Telecommunications Commission's Memorandum Order No. 08-09-2011, although almost all fixed-lines in the city still use the old 46 area code due to the poor compliance of PLDT and Globe to the said memorandum order. PLDT's response to the memorandum order is the release of its "Call All Manila SIM", an exclusive wireless landline service for Bacoor residents, however the Barangay Molino VII (Sitio Gawaran)...
Mobile area codes are three digits long and always start with the number 9, although recently new area codes have been issued with 8 as the starting digit, particularly for VOIP phone numbers. However, the area code indicates the service providerand not necessarily a geographic region. Unlike fixed-line telephones, the long-distance telephone dialling format is always observed when using a mobile phone. Therefore, mobile phone numbers always have the format "+63 966 164-5400" for international callers and "0 966 164-5400" for domestic callers. Some of the first area codes to be assigned for mobile phones were 912 for Mobiline/Piltel, 915 for Islacom, 917 for Globe Telecom, 918 for Smart Communications, and 973 for Express Telecom. As service began growing rapidly since the 1990s, new codes have been added to meet demand as existing codes have since been exhausted. Newer codes often come immediately after the last code exhausted, but this might not be the case if the next code is alr...