Some of the regular numbers for calling a cab are 222-777, 311-011, 333-555, 444-666, 555-777, and 51-06-06. For inner-city rides you should calculate with about 100 Rbl. per ride, for rides into the outbounds with about 150 Rbl. In order to avoid unpleasant surprises, you should always specify the conditions before taking the ride, because there are always some private cabs among the official ones. The biggest advantage is the availability of not only car-size cabs but also small busses. This is especially recommended for groups with a lot of luggage.