This number calls people who are on the do not call list. If you are called by these people please file a complaint with the FTC at https://complaints.donotcall.gov/complaint/complaintcheck.aspx.

Call their number back, press 1 when the robot starts talking, then ask for the name of the company the representative works for (for the FTC complaint). Then tell them that you are reporting them to the FTC. Ask to never be called again; they will remove you from their list. Works like a charm. Then submit FTC complaint. These people are scum.