Yes! 8-800 numbers are widely recognised as toll free numbers in Russia.
These are free to call from landlines and mobiles in Russia and are mostly used in call centres and sales departments as customer service lines.
When a call is made to a toll free number in Russia (from anywhere within the country), it is forwarded to a mobile, telephone or VoIP (Voice over Internet Protocol) of the company’s choosing. And, instead of the caller being charged for the call, the receiver incurs all costs.