More Currencies. The Russian Ruble, which is the official currency of Russia, has the ISO 4217 Code of RUB. The corresponding ISO-4217 Code Number for RUB is 643. The RUB ISO code has a currency exponent of 2.ore Currencies. The Russian Ruble, which is the official currency of Russia, has the ISO 4217 Code of RUB. The corresponding ISO-4217 Code Number for RUB is 643. The RUB ISO code has a currency exponent of 2.