I am assuming that you are curious about your 401k money. If I am correct, you have a few options, however, I would almost certainly recommend rolling the account over to an IRA that can be set up with any discount broker. That should be accomplished relatively quickly.
Start by reaching out to to your 401k provider. If you do not know who your 401k provider is, speak with someone in your former companies HR department and they should point you in the right direction. Good luck!