HOW TO SAY IN RUSSIAN WHERE YOU ARE FROM.
THE USE OF THE GENITIVE CASE
The genitive case is used in several situations (for more read here), and one of them is to indicate a starting point after the preposition “from”.
Examples
1. Я из Берлина. - I'm from Berlin.
2. Он из Москвы. - He is from Moscow.
3. Они из Монако - They are from Monaco.