Received a call from 810-339-4390 on 12/23/2015 at 5:43pm EST. Caller ID displayed "Flint MI".
Google Voice already has this number on their spam list so my phone only rang once and the caller was automatically sent to voicemail. No message was left.
Based on the comments posted elsewhere it appears that this is yet another number being used by the "Canadian Pharmacy" scam. I have been receiving calls from this scam since 2009 and have currently blocked 65 different numbers related to it. Interestingly, the last number they used was from the same area code and exchange (810-339-4019) and displayed the same caller ID (Flint MI).
I have added this number to my GV block list. If the same number calls again the caller will received the out-of-service message.