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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-BTTTT ...
For example, for a number in Costa Rica they would write (506) 2222-2222 instead of +506 2222-2222. On the other hand, Guatemala does have the custom of using the + sign. It is quite common for Central American businesses to write the whole phone number, including the country code in parentheses, on business cards, signs, stationery, etc.
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.
Vietnamese uses 22 letters of the ISO basic Latin alphabet.The four remaining letters are not considered part of the Vietnamese alphabet although they are used to write loanwords, languages of other ethnic groups in the country based on Vietnamese phonetics to differentiate the meanings or even Vietnamese dialects, for example: dz or z for southerner pronunciation of v in standard Vietnamese.
Military call sign. Military call signs are call signs (or callsigns) or specialized form of nickname assigned as unique identifiers to military communications. In wartime, monitoring an adversary's communications can be a valuable form of intelligence. Consistent call signs can aid in this monitoring, so in wartime, military units often employ ...
The International Telecommunication Union (ITU) allocates call sign prefixes for radio and television stations of all types. [1] They also form the basis for, but may not exactly match, aircraft registration identifiers. These prefixes are agreed upon internationally, and are a form of country code. A call sign can be any number of letters and ...
The full identifier starts with an ISO 3166-1 alpha-2 (2 letters) country code (except for Greece, which uses the ISO 639-1 language code EL for the Greek language, instead of its ISO 3166-1 alpha-2 country code GR, and Northern Ireland, which uses the code XI when trading with the EU) and then has between 2 and 13 characters.
The postal code system of Vietnam has officially been changed from 6 digits to 5 digits. Each country has its own separate postal code or zip code system. The postal code of Vietnam is composed of 5 digits, with the following meanings: [ 2 ][ 3 ] The first digit determines the area code. The first two characters identify the centrally-governed ...