That's actually why I was close to desperation when I edited the WIKI site about Russian data rates.
They have all kinds of regional and national data. It is really similar to the US. You get a number based on a local region with the appropriate local code.
This may or may not lead to surcharges using it outside of the region even for data, calling outside or being called from outside even on the same network.
Furthermore the rates differ (even on same network) from region to region.
Nevertheless, I just took Moscow and St. Petersburg, reedited the data and had it checkd by a Russian friend. This is what I've made of the mess:
http://prepaidwithdata.wikia.com/wik...ian_Federation