Just received this call maybe five minutes ago on my cell. Didn't know the number and was busy at work so didn't bother to answer. No voicemail left. I'm in Alexandria, VA and had this number for nearly a decade.
10:30pm local time. Just got this call (for the third time today with no VM left) and decided to answer. It was a pollster of some sort wanting to ask some political questions. I told them it was too late to be calling (I am living 3 time zones east of where my cell phone's area code is) and that I didn't want them to call again. Mystery solved.