Here is a link for this topic

Looks like borisg is right. You can report it on schedule E. Here is a link: http://en.allexperts.com/q/Tax-Law-Questions-932/2009/4/LLC-rental-income-capital.htm

But I still don't know how you can tell if the property is under you personal name or LLC? On schedule C, you can enter the business name, EIN # even it's a disregarded entity. The purpose for setting up LLC is for liability protection. If on scheudle E, every property is the same and cannot distinguish between personal and LLC asset, will that make you lose the LLC protection?