marie-helene is correct. However, you may have gotten that phrase from spoken English. We tend to shorten it when we're lazy or in a hurry, so "where are you from" sounds like "where you from." The "are" gets blended in with the "where".

Hi... Correction : Where do you come from ? Answer : I'm from France but I live in Australia.

hey u~m from china.nice to meet you

hi, I'm from Italy =)

Hi Safaa, it's nice to meet you. I live in Australia.