Principally in any state. But it is subject to the bank to accept you and your LLC or not. I would recommending asking before, especially if there is no conection to the US and no SSN/ITIN.Lets say you'd have an US LLC in Colorado. Could you travel in the US and open a bank account with a real bank (not EMI) in any state? Like Florida, New york, Texas etc. or does it need to be in Colorado?