Welcome to the forums. This is a relatively modern model. The Dalmine (or any other aluminum Bianchi Pista variant) weren't offered in North America prior to 2012. However, you're located in Indonesia, which complicates matters, as Bianchi models often varied from market to market. Looking at the serial number and how the first characters are a smaller font, it's very tempting to say that it's a 2008 model.

Edit: Picture assist...