Who called from 2182166033

This number has called four times over the past 2 days, never leaving a message.

4 calls in the last 2 days, no message.

I got frustrated with the repeated calls from "Duluth, MN" that didn't leave a message, so I finally answered. It was a political survey - "Who would you vote for....?"

3 calls today, 1 yesterday, 1 the day before. No message.