I too had received several calls from this number without them leaving a message.  I tried the trick of calling them back and entering a random phone number and the system put me through to an operator.

Turns out it belongs to Wyndham Consumer Finance who had been trying to reach me concerning an overdue bill.  So, at least for me, this was a legitimate call and not some kind of scam or etc.

I received this number more than once sometimes days in a row and there is never any message and when I look it up it states unlisted lanline in Dale City, VA.  When you call it back there is a recording to put in your number - I hung up instead.