In this case, this a survey company, not Social Security . This is SSI Survey Sampling, a marketing research company. To get removed from their call list: URL is http://www.surveysampling.com/.
This is now the third number they call me from. Their name is Survey Sampling International, or something like that, and they call multiple times a day. The only way to stop them - or any of the thousands of other nuisance callers - is to acquire a call blocking system. I spent $40 on a Sentry call blocker and its the best 40 bucks I ever spent. They call the first time and then I 'black list' them and the phone never rings again for that number and they have no access to voice mail.
I've received a call about twice so far today. The phone doesn't ring long enough to answer, but my caller ID caught the number. Can't even respond to holler at them. "SSI"