I get this call all the time (from Marysville, WA) on my cell phone... at work, at home on Sunday, all the time. I thought my number was registered on NO CALL. Once I answered (at work), heard the word "survey", hung up.
I looked up IND SUR GROUP on the net and got this:
This is a scam. They ask some political questions, then offer a "free" cruise as a reward for answering. I read on another site that they are asking for credit card #s to cover "port taxes".
Mystery solved.
The moral of this story: never answer calls from people/businesses you fon't know.