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+7 is an ITU country code for telephone numbering. It was originally assigned to the Soviet Union.After the 1991 dissolution of the Soviet Union, the code continued to be used by the fifteen successor states, the majority of whom switched to own country codes from the +3xx and +9xx ranges between 1993 and 1998.
Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. The prefixes enable international direct dialing (IDD). Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a country or world region other than the caller's.
Kazakhstan has been sharing the country code 7 with Russia since its independence in 1991. In 2021, ITU reserved the code 997 [2] for Kazakhstan, and the country planned to activate it in January 2023. In early 2023, however, Kazakhstan applied for a change of code to 77. [3] In late 2023, Kazakhstan decided to keep the country code 7. [4]
A country code top-level domain (ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code. All ASCII ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs.
Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this number.
Internationally, Russia participates in the numbering plans of the International Telecommunication Union (ITU) provided by recommendations E.164 and E.123, using the telephone country code 7. Russia shares its numbering plan with Kazakhstan, designating two area codes for routing calls to that country.
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This is a list of international dialing prefixes used in various countries for direct dialing of international telephone calls.These prefixes are typically required only when dialling from a landline, while in GSM-compliant mobile phone (cell phone) systems, the symbol + before the country code may be used irrespective of where the telephone is used at that moment; the network operator ...