Interesting post. Same behaviour here. Got calls first by (215) 442-7490 and then a couple of days later by (419) 725-9037. Did not answered, no messages left either.
Call received from 419-725-9037. Caller ID was TNS. Received another call just 1hr 15min earlier from 215-442-7094, also from TNS. Same caller ID's, but different numbers/area codes. I think it's safe to link these two numbers together. Did not answer either call.
They called me twice about an hour ago. First time they hung up. Second time a few minutes later, a woman started her spiel by telling me they are not selling anything and that they are just looking to do a survey on local opinion and asked to speak to the youngest female in the house. All this before I said anything but "hello". I told them to stop calling me.
This is a polling service. My call was a question about the Kentucky lottery. They wanted to know if there was a 18 to 36-year-old in the household. When I said no, they thanked me and hung up. But they have continued to call from this same number several more times. We haven't answered.