The phone code 7 at the beginning of the phone number +7 (subscriber’s phone) means that you are being called from Russia, Kazakhstan or you are calling a subscriber registered in Russia, Kazakhstan.
+7 — Russia, Kazakhstan
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Telephone Code +7 — what country it is
The international phone code +7 officially belongs to Russia and Kazakhstan, so all phone numbers that start with these numbers refer to these countries.
It means that you must enter “7″ after the “+” sign to call to Russia or Kazakhstan. Then the next digits of the phone number can be entered.
Whose country code is +7?
+7 is the beginning of a phone number which can belong to any subscriber who purchased a SIM card in Russia or Kazakhstan. It does not mean that a subscriber is definitely there at the time of the call (since he or she can make a call in roaming), but there is such a possibility.