Make sure you didn't get a disbursement from them when you left. They might have records but chances are when you left, paperwork was sent to you asking how you wanted to handle the transfrer.

I don't remember getting anything from them at all, but how can I find out? who should I call or what website should I go to? I have no access account or any info excepted my W2 form show that how much I have for my 401K during that year and how much they deducted out from my paycheck per each week.

You can contact HR at the company and ask them about it. 401ks are managed by some outside company, not the one you worked for. You should have some paperwork about that. If you had funds in the 401k which were vested, then you still have it someplace. If you were not vested then the money in the 401k went back to the employer and nothing is left. Usually, vesting takes place either at once or after 5 years of work. We are talking here about employer contributions. If you contributed out of your salary, that is 100% vested.