How long do I wait before I call to check on an application?

So I just have a general question that more or less relates to judgement, but I wanted to get some input. I am a senior in college out of state and am dying to get on back home in MA so I applied as a special in my town. This was back in August and I haven't heard anything. Any thoughts on whether or not I should call to inquire, or would the department call me if they were truly interested in putting me on? Thanks for the advice in advance