This number called left no message, probably checking to see who is home and who they can break in on. If it is important enough to call, it should be important enough to leave a message. We have an answering machine and I usually do not answer if I do not recognize the number, I allow the machine to pick it up.
They called today and actually I spoke to a person. Claimed to be "Solar Research", they were going to be doing some installs in my area and wanted to ask me some questions. I asked what area and he named my town. I asked where the company was located a he gave me a neighboring town. I said then why does the call show as coming from a town 2 hours away. I then said that they were the company that keeps calling and I keep blocking and that they are spoofing the number or he is lying. He got indignant said if I wasn't going to help him that he wasnt going to help me and hung up.