We keep getting calls from this number and several others where, once I answer there is nothing but dead air.  I think that this is a robo-dialer.  The number is spoofed so calling it back will not help you   Find the real owner.  Programs like this dial phones in numerical order and log active and inactive phone lines.  They will then use the list of active lines for there scams or even resell the list of good numbers to a third party normally based overseas so that companies can try to scam you with "bad debt" collection attempts or other such nonsense.
This works the same way with massive emails.  They send out emails in sequence and then check what addresses bounced back and what ones didn't.
There is not a lot that you can do about the calls other than ignore them.  You used to be able to block any calls coming from a certain area code but I am not sure if this is still something that someone can do or not.  Besides, blocking out an entire area code could cause you to miss important calls.
Just my suspicions.