Country Code: +7
International Call Prefix: 8~10
Trunk Prefix: 8
Telephone numbers in Russia are under a unified numbering plan with Kazakhstan, both of which share the international code +7. Historically, +7 was used as the country calling code for all of the Soviet Union. Following the Soviet break-up, all of its former republics, save for Russia and Kazakhstan, switched to new country codes. Following Abkhazia's secession from Georgia, Abkhazia switched to the Russian telephone codes +7 840 for landlines and +7 940 for mobile phones, though it still can be reached via the Georgian telephone code +995 44. After the Crimean status referendum, 2014, Crimea has also switched to the Russian telephone codes +7 978 for mobile phones and +7 869 for landlines in Sevastopol and +7 365 for landlines in the rest of its territory since 7 May 2015.
Russia uses a four-level (local, zone, country, international) open dialing plan. Local telecommunications regulators had planned to abandon this system and change to a closed dialing plan at all levels by 2009, but postponed the changeover until 2010, and later pushed once more until 2012. Currently, all national subscriber numbers consist of 10 digits (excluding any prefixes), with 3 digits for an area code and a 7-digit individual number which includes a zone code.
The international dialing prefix in Russia is "8~10"—callers dial "8", wait for a tone, and then dial "10", followed by the country code, area code, and number. The long distance prefix is "8~". There are plans to change those prefixes to "0" for national and "00" for international dialing, but they are not yet implemented.